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Primary scrambling code (PSC) searching method and PSC searching device

A search method and one-way technology, applied to electrical components, transmission systems, etc., can solve problems such as high implementation cost, poor parallel effect, and low computational efficiency

Active Publication Date: 2015-03-18
MORNINGCORE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The WCDMA system base station will send PSC (Primary scrambling code, primary scrambling code) signal, and the terminal obtains the time slot timing of the system through the correlation detection of the PSC signal. The existing PSC search generally uses the correlation structure of the multiplier to calculate the position of the PSC , this method has poor parallel effect, high implementation cost and low computational efficiency

Method used

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  • Primary scrambling code (PSC) searching method and PSC searching device
  • Primary scrambling code (PSC) searching method and PSC searching device
  • Primary scrambling code (PSC) searching method and PSC searching device

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Embodiment 1

[0030] Such as figure 1 As shown, the present invention provides a kind of PSC search method, comprising:

[0031] Step S1, the WCDMA system terminal obtains the oversampling signal of each channel from the received multi-channel over-sampling signal, wherein the multi-channel over-sampling signal is x(n·R+r), n=0,1,2,... , r=0,...,R-1, R is the oversampling rate of the WCDMA system terminal, the oversampling signal of each channel uses 256-point correlation, and the oversampling signal of each channel is x(n), n=0,1, 2, ...; Specifically, when doing PSC processing, in order to reduce the amount of calculation, 256-point correlation is used. In this embodiment, each oversampling signal is multiplied by the local PSC sequence of the WCDMA system terminal, and then multiple Correlation result output of passing sampling signal;

[0032] Step S2, calculate u(m 1 ;k 1 ,k 2 ),in, u ( m 1 ; ...

Embodiment 2

[0044] Such as figure 2 As shown, the present invention also provides another PSC search device, which adopts the method described in Embodiment 1, and the device includes a first correlator 1, a second correlator 2, a first rotary switch 3, and a second rotary switch 4 and multiplier 5.

[0045] The output of the first correlator 1 is input to the second correlator 3 through the first rotary switch 2, and the output of the second correlator 3 is input to the multiplier 5 through the second rotary switch 4;

[0046] The first correlator 1 is used to calculate u(m 1 ;k 1 ,k 2 ), the first correlator 1 includes a first adder 12 and 15 sequentially connected shift registers 11, the input of the first shift register 11 is the oversampled signal x(n) of the road, The output of the last shift register 11 in the first correlator 1 is the input of the next shift register 11, and the oversampling signal x(n) of this road and the output of each shift register 11 are respectively re...

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Abstract

The invention provides a primary scrambling code (PSC) searching method and a PSC searching device. b(m1)u(m1;k1,k2) of each path is computed, and y(k) of the path is computed according to the b(m1)u(m1;k1,k2) of each path, so that the problem of PSC searching in a wideband code division multiple access (WCDMA) system is solved. The PSC searching method and PSC searching device have low cost, can facilitate parallel computation by software or hardware, reduce the cost of realization of the hardware or the software mainly through a summator and a shifting register, and improve computational efficiency.

Description

technical field [0001] The invention relates to a PSC search method and device. Background technique [0002] The WCDMA system base station will send PSC (Primary scrambling code, primary scrambling code) signal, and the terminal obtains the time slot timing of the system through the correlation detection of the PSC signal. The existing PSC search generally uses the correlation structure of the multiplier to calculate the position of the PSC , this method has poor parallel effect, high implementation cost and low computational efficiency. Therefore, there is an urgent need for an efficient PSC search method and device. Contents of the invention [0003] The purpose of the present invention is to provide a kind of PSC search method and device, can solve the PSC search problem in the WCDMA system, can conveniently carry out parallel operation with the mode of software or hardware, mainly use adder and shift register to reduce hardware and software to realize time cost and ...

Claims

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Application Information

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IPC IPC(8): H04B1/7073
Inventor 王卫兵
Owner MORNINGCORE TECH CO LTD
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