Method and apparatus for implementing scrambling code phase rapid rotation in WCDMA system

A code phase, fast technology, applied in baseband system components, shaping network in transmitter/receiver, communication between multiple stations, etc., can solve the problem of slow rotation speed of scrambled single bit and influence on division and multiplexing Efficiency, large consumption of matrix computing resources, etc., to achieve the optimization of hardware resources and efficiency, avoid the reduction of time division multiplexing efficiency, and improve the effect of hardware resources and efficiency

Inactive Publication Date: 2008-01-02
ZTE CORP
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Problems solved by technology

[0010] In order to overcome the shortcomings in the prior art that the single bit rotation speed of the scrambling code is too slow, which affects the time division multiplexing efficiency of the RAKE receiver, and consumes too much resource using matrix operations, the present invention provides a WCDMA system scrambling based on multipath phase change Method and device for fast rotation of code phase

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  • Method and apparatus for implementing scrambling code phase rapid rotation in WCDMA system
  • Method and apparatus for implementing scrambling code phase rapid rotation in WCDMA system
  • Method and apparatus for implementing scrambling code phase rapid rotation in WCDMA system

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[0040] It can be seen from the scrambling code generator shown in FIG. 1 that the logic part for generating the scrambling code IQ is removed, and the remaining simple shift generator of the scrambling code phase register is shown in FIG. 2 .

[0041] It can be seen from the figure that the highest bit of the X and Y phases is the 24th bit, where the next 24th bit of the X phase is generated by the XOR of the 0th bit and the 3rd bit, and the next 24th bit of the Y phase is generated by the 0th bit bit, the 1st bit, the 2nd bit and the 3rd bit XOR, and at the same time, the current 1st bit to 24th bit of X and Y are shifted to the right to form the next 0th bit to 23rd bit, realizing a bit scrambling code sequence shift bits, thus forming a shift process of the scrambling code phase.

[0042] Therefore, if you want to realize the shift of two bits at a time, then the next 24th bit of the X phase is generated by the XOR of the 1st bit and the 4th bit, and the 23rd bit is generat...

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Abstract

The invention discloses a method for quickly rotate phase of interfere code in WCDMA system, and a relative device, wherein when multi-path phase is forwards refreshed, dividing 16 or 256 on the phase change difference of refreshed multi-path phase, processing accumulation, to obtain the needed times of interfere code phase acceleration, using an acceleration time counter and a compare device to realize interfere code phase accelerated rotation, when multi-path phase is backwards refreshed, using the interfere code waiting sheet counter and the compare device, to realize waiting / accelerated control of interfere code phase with refreshed multi-path phase. The invention can avoid time-division multiplex efficiency reduction of whole RAKE receiver caused by interfere code accelerated rotation when using single interfere code generator, to confirm the time-division multiplex efficiency of RAKE receiver, while the consumed hardware resource is some simple logic devices, less than the hardware consumption of new phase calculation of interfere code via matrix, to save hardware resource.

Description

technical field [0001] The present invention relates to the baseband processor technology of wideband code division multiple access system (WCDMA), in particular to the implementation method of phase rotation of scrambling code under the condition of multipath update under the condition of parallel processing of multiple channels of base station, and its hardware implementation device. Background technique [0002] In wideband code division multiple access communication system, in order to anti-jamming, anti-multipath, anti-interception, secrecy, multiple access communication, synchronization, etc., a pseudo-random code sequence is used to encrypt the signal, that is, to encrypt the spread spectrum signal. disturb. When the base station obtains the baseband signal sent by the user through radio frequency reception, it needs to perform an inverse operation of scrambling on the received baseband signal, that is, descrambling. In wideband code division multiple access communic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04B7/26
Inventor 陈月峰陈力冯立国
Owner ZTE CORP
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