KR100328759B1 - A detecting device of finger lock for pcs phone - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal in a CDMA mobile communication system. In particular, even when a lock is detected in an initial state, which is a state before a frequency and timing are correctly maintained, the present invention uses a lock position obtained from a finger searcher to quickly and accurately. A finger lock detection apparatus capable of detecting a lock and comprising a searcher portion, a finger portion, and a controller portion, the finger portion comprising: a finger portion; A position shifter which receives a position signal from the controller and adjusts a timing position of the terminal receiver to a timing position of a corresponding frequency; A finger searcher for re-finding the position signal having the best signal strength in a constant range based on the position signal received by the position moving unit and notifying the controller to the controller as confirmation position information; An automatic position shifter which controls the terminal receiver to adjust the timing position by the position found by the finger searcher; By comparing the signal received at the position selected by the automatic position shifter with the signal received directly from the receiver in a correlation, if the selected position is above a certain level, the selected position is selected and maintained. A lock detector which measures the signal strength and outputs the signal to the controller; A tracking and demodulation unit has a feature of demodulating data from a received signal after tracking so as to maintain synchronization with a reception signal of a position held by the lock detection unit.

Description

A DETECTING DEVICE OF FINGER LOCK FOR PCS PHONE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver of a code division multiple access (CDMA) mobile communication system terminal, and more particularly, a finger that functions as frequency, timing tracking, and data demodulation. A device for improving lock detection performance. The lock position obtained by a finger searcher even when a lock is detected in an initial state before the frequency and timing are correctly maintained. Position can be used to detect locks quickly and accurately.

In a code division multiple access (CDMA) mobile communication system, in order to secure a channel between a base site and a terminal, communication channel allocation, frequency information, and uniqueness of a terminal are provided through a pilot channel transmitted from the base station. It receives necessary information such as a number, and this process is called a finger lock.

Hereinafter, an apparatus for detecting a finger lock in a terminal according to the prior art will be described with reference to the accompanying drawings.

1 is a functional block diagram of a finger-lock detection device according to an embodiment of the prior art.

The apparatus for detecting a finger lock of a CDMA terminal according to the accompanying drawings, receives a signal of a pilot channel transmitted from a base station at a high frequency (RF) unit, and converts the signal r into a digital signal at the A / D converter (r). (t)) is applied to detect a received energy signal (Se: Search Energy), which is the strength of the signal received from the base station, and a position (Sp: Search Position) signal indicating a timing, which is a reference time of the pilot channel. Searcher unit 10 for outputting by

The searcher 10 receives the received energy signal Se and the position signal Sp and processes them to process the timing, that is, the position where the energy of the received signal is the highest. A controller 20 for outputting information (Fp: Finger Position),

The position information Fp of the timing with the highest energy is drawn from the controller unit 20, and the digital reception signal r (t) is applied from the high frequency receiver of the terminal, and the pilot channel of the pilot channel received from the controller 20 is received. A position moving unit 32 for analyzing the position information Fp and adjusting the timing position of the terminal receiver with the corresponding position; When the signal received from the position selected by the position moving unit 32 and the received signal r (t) directly received are compared by correlation, the value is equal to or greater than a threshold level. A lock detection unit 34 configured to maintain the selected state, and measure a received signal strength indicator (RSSI) to report the current state to the controller unit 10; Through the position held by the lock detection unit 34, the signal is maintained in synchronization with the signal of the pilot channel transmitted from the base site (Base Site), and the signal r (t) received while the synchronization is maintained. And a finger portion 30 which is composed of a synchronization holding and demodulation portion 36 for demodulating data from the data.

The plurality of finger parts 30 detect a signal applied through various radio propagation paths (Multi Path) using a plurality of fingers, and combine the plurality of finger parts 30 to output an output signal. By using it, a signal of stable level is used.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A detailed operation and operation will be described with reference to the accompanying drawings of the prior art of such a configuration.

In a CDMA mobile communication system, a terminal that receives a signal of a pilot channel transmitted from a base site (not shown) in the drawing converts an analog signal into a digital signal r (t) through a high frequency unit.

The digital signal r (t) is applied to the searcher 10, and the received energy signal Se is detected or extracted by measuring the intensity of the pilot signal applied from the base station.

At the same time, the searcher 10 extracts a position signal Sp of a timing required for synchronization in order to receive a data signal transmitted from the base station.

The received energy signal Se and the position signal Sp are applied to the controller unit 20, and the controller unit 20 measures the distance between the base station and the terminal by analyzing the received energy signal Se. It is used as a signal necessary for hand-off processing and the like, and by analyzing the position signal Sp, the position information Fp of the path having the largest energy intensity of the signal is extracted, and the finger portion ( 30).

The finger part 30 receiving the position information Fp operates the position moving part 32 so that the timing position of the pilot channel based on the position information Fp, that is, the strength of the most signal. The timing position of the reception function unit is controlled at the position of the strong timing.

In addition, the finger part 30 compares the signal and the received signal r (t) with the correlation by the internal position to maintain the position of the position moved by the position moving part 32, and at a predetermined level. In case of abnormality, a pilot channel signal transmitted from the base station to output a lock signal for continuously receiving the corresponding signal and to report the signal state of the current locked position to the controller unit 10 at the same time. Received Signal Strength Indicator (RSSI) is measured and applied to the controller 20.

When the RSSI signal applied from the corresponding finger part 30 is equal to or less than a predetermined level, the controller 20 controls the corresponding finger part 30 to be in an operation standby state, and the remaining plurality of finger parts ( By combining the signal d (t) output from 30), the strength of a good reception signal can be kept constant.

As described above, through the position held by the lock detector 34 of the finger unit 30 having the RSSI equal to or more than a predetermined level, the synchronization maintaining and demodulation unit 36 transmits the frequency of the pilot channel transmitted from the CDMA base site. Tracking is performed to maintain the Synchronization state with the signal, and the data is demodulated by processing the received signal r (t) while the Synchronization state is maintained and outputted (d (t)). )do.

However, the finger lock detection apparatus of the terminal according to the prior art as described above, the position signal for the optimal signal state is detected in the searcher unit 10, is applied to the controller unit 20, the controller unit 20 Since the position information Fp of the frequency having the highest signal strength is detected and then applied to the finger portion 30, a delay occurs in time. In particular, if the delay is delayed by one or more cycles in one unit of a CDMA system, the finger unit 30 cannot lock the delay.

That is, even if the receiver is moved and adjusted to the position by the position information Fp, the signal of the frequency transmitted from the base station is already moved to another position, so the lock detector 34 has the highest signal strength. It is impossible to detect and maintain a lock state that maintains a good state, and since the received signal strength RSSI of the signal detected by the lock detector 34 becomes a weak signal, the corresponding ping is performed by the controller unit 20. Rejection 30 has a problem that the transition to the operation (Disable) state.

Therefore, the finger part 30 receives position information through the searcher part 10 and the controller part 20 again, finds an optimal position, and then locks again. There was a problem that takes a long time to.

The present invention performs a search function in the finger unit again by using the position information applied from the controller unit, and adds a function unit that can automatically move to the position by the position signal extracted from the finger search unit, thereby providing a finger lock. It is an object of the present invention to provide a device that increases the probability of 의 and consequently reduces the time for locking.

In order to achieve the above object, the present invention provides a device for detecting a finger lock of a terminal including a searcher, a finger, and a controller, the finger unit; A position shifter which receives a position signal from the controller and adjusts a timing position of the terminal receiver to a timing position of a corresponding frequency; A finger searcher for re-finding the position signal having the best signal strength in a constant range based on the position signal received by the position moving unit and notifying the controller to the controller as confirmation position information; An automatic position shifter which controls the terminal receiver to adjust the timing position by the position found by the finger searcher; By comparing the signal received at the position selected by the automatic position shifter with the signal received directly from the receiver in a correlation, the selected position is selected and maintained when the selected position is above a predetermined level, A lock detector which measures the received signal strength and outputs the signal to the controller; And a tracking and demodulating unit for demodulating data from the received signal after tracking so as to maintain synchronization with the received signal of the position held by the lock detection unit.

1 is a functional block diagram of a finger lock detection apparatus according to an embodiment of the prior art,

2 is a functional block diagram of a finger lock detection apparatus according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: searcher 20: controller 30,40: finger

32: position moving unit 34: lock detection unit 36: synchronization maintaining and demodulation unit

42: finger searcher 44: automatic position shifter

Hereinafter, an apparatus for detecting a finger lock of a terminal according to the present invention will be described with reference to the accompanying drawings.

2 is a functional block diagram of a finger-lock detection device according to an embodiment of the present invention.

The functional block having the same function as the prior art used the same part number.

The apparatus for detecting a CDMA terminal finger lock according to the present invention according to the drawings attached and referenced above, receives a signal of a pilot channel transmitted from a base site of a CDMA mobile communication system at a high frequency (RF) receiver. After the process of amplification and filtering, the A / D converter receives the digital signal r (t), and the energy of the received signal which is the strength of the signal received from the base station (Se: A searcher unit 10 for detecting and outputting a search energy (Sp) signal indicating a search energy and a timing which is a reference time of the base station pilot channel;

The received energy signal Se and the position signal Sp applied from the searcher 10 are processed, so that the timing signal of the position having the highest energy level of the received signal, that is, the position A controller unit 20 for outputting information (Fp: Finger Position) of the position;

The position information Fp of the timing having the greatest energy level is received from the controller 20, and the position information Fp of the pilot channel received from the controller 20 is analyzed to determine the corresponding position. A slewing part 32 of the finger part 40 for tuning the timing position of the CDMA terminal receiving part so as to receive a frequency signal of

The position signal detected by the searcher 10 is processed by the controller 20 and then applied to the position shifter 32 to delay and delay the received signal r (t). Since the timing position signal having the largest energy intensity may be different from the position signal applied from the controller 20, the position shift unit 32 may have a constant small position based on the position signal applied by the position shifter 32. In the area of the range, by searching again, the energy value having the largest signal strength and the position signal of the timing corresponding to the same are accurately extracted and recorded in the self-recording unit, and at the same time, the confirmation position information in the controller unit 20 is obtained. As the CFp, the finger searcher 42 for notifying and

An automatic position shifter 44 for controlling the timing position of the CDMA terminal receiver to be automatically tuned to the position of the timing corresponding to the energy value of the signal having the greatest intensity applied from the finger searcher 42. Wow,

By comparing the signal received from the timing position selected by the automatic position shifter 44 with the received signal r (t) received directly from the receiver of the CDMA terminal by correlation. When the signal received from the selected timing position is equal to or greater than a predetermined threshold value, the automatic position moving unit 44 adjusts the moving position so that the moved position is selected and maintained. A lock detection unit 34 measuring a received signal strength indicator (RSSI) and reporting a current signal reception state by thrust to the controller unit 20;

Synchronization is maintained in synchronization with a signal of a pilot channel transmitted from a base site through a position signal held by the lock detector 34, and synchronization is maintained. Is composed of a finger part (40) comprising a synchronization holding and demodulation part (36) for demodulating (demodulation) data from a signal r (t) received by the terminal.

Hereinafter, the apparatus of the present invention having the above-described configuration will be described in detail with reference to the accompanying drawings, and the description of the same parts as the conventional configuration will be briefly or omitted.

The searcher 10 is a timing position signal for synchronizing a received signal Se of a path having the greatest energy intensity among the various radio wave propagation paths with a signal received in the corresponding path. (Sp) is extracted and applied to the controller unit 20.

The controller 20 processes the signal applied from the searcher 10 to apply the position information Fp to the position shifter 32 of the finger 40.

Accordingly, a signal of the position information Fp delayed in time while passing through the searcher 10 and the controller 20 is applied to the position shifter 32.

However, the position shifter 32 adjusts the timing position of the CDMA terminal receiver so as to receive a signal having a frequency according to the applied position information signal Fp.

At this time, the finger searcher 42 according to the present invention, based on the position information signal Fp applied to the position shifter 32, is a signal of a path having a large energy intensity and a corresponding timing position once again within a predetermined small range. Search.

In other words, the finger searcher 42 searches the energy value of the signal having the greatest intensity and the timing position signal once again within a range smaller than the search range of the searcher 10, and the result is transferred to its own recording device. At the same time as the recording, the controller unit 20 applies the confirmation position information CFp to the controller unit 20.

The automatic position shifter 44 precisely tunes the timing position of the CDMA terminal receiver once again according to the energy value and the position information signal applied from the finger searcher 42, thereby providing a time difference. It allows the signal to be received at the correct timing position.

The following is omitted because it is the same as the operation by the conventional technical configuration.

Therefore, since the positional movement of the path position caused by the delay caused by passing through the searcher 10 and the controller 20 can be quickly recovered, even in an initial situation in which timing is not stabilized quickly and accurately. The signal strength of the path with the largest path can be locked.

In addition, by preventing the operation of the finger portion 40 (Disable), since the path position signal through the searcher 10 does not need to be applied again, it does not take time to lock again. have.

According to the present invention, the finger portion has its own finger search portion and an automatic position shifter, and automatically tracks the positional movement of the position due to time delay, thereby rapidly moving to the position of the path having the greatest signal strength. It works.

In addition, even when the timing is not stabilized, there is an effect that the signal strength can be locked to the position of the path with the largest signal strength.

In addition, there is a useful effect of preventing the disabled state of the finger portion.

Claims (2)

(Correction) A finger lock detection device of a terminal comprising a searcher portion, a finger portion, and a controller portion, the finger portion comprising: A position shifter which receives a position signal from the controller and adjusts a timing position of the terminal receiver to a timing position of a corresponding frequency; A finger searcher for re-finding the position signal having the highest signal strength in a constant limited range based on the position signal received by the position shifter and notifying the controller to the controller as confirmation position information; An automatic position shifter which controls the terminal receiver to adjust the timing position by the position found by the finger searcher; By comparing the signal received at the position selected by the automatic position shifter with the signal received directly from the receiver in a correlation, the selected position is selected and maintained when the selected position is above a predetermined level, A lock detector which measures the received signal strength and outputs the signal to the controller; And a synchronization maintaining and demodulating unit for demodulating data from the received signal after tracking so as to maintain synchronization with a reception signal of a position held by the lock detection unit. (Correction) The method according to claim 1, The finger searcher obtains the largest energy value and the corresponding position value of the signal received in the limited range, And the automatic position shifter adjusts the terminal receiver to move to a signal having the highest energy value and a corresponding position among the signals obtained by the finger searcher.