Receiving device and method for TD-SCDMA system

Abstract

The invention discloses a receiving device and method in TD-SCDMA syste, the invention gives out a data demodulating device and method when TD-SCDMA is in the same frequency net to realize effective receiving of area under interference of the same frequency, so requirement of TD-SCDMA can be fulfilled. It includes: data separator which separates data received training sequence part and data part; channel evaluator which evaluates channel swash response based on training sequence of area and training sequence separated by data separator; multi-area code-track activating evaluator which evaluates activating code-track; multi-area channel activating response processor which eliminates noise and evaluates power of noise; multi-area system matrix generator, multi-area matching filter, multi-area relative matrix generator, Cholesky decomposer and a matrix inversion machine; multi-area equation resolver.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a receiving method and device for realizing high-quality reception in the high-speed data transmission service of the third-generation mobile communication system TD-SCDMA (Time Division Synchronous Code Division Multiple Access System). Background technique [0002] Since the 1990s, with the rise of wireless communication around the world, the demand for wireless resources is increasing, and corresponding research has emerged. We know that for wireless resources, the use of spectrum resources has strict boundaries, so the spectrum bandwidth that can be used for wireless communication is not unlimited, especially in the era of rapid development of broadband communication and spread spectrum communication. Today's mainstream air interface standards are spread spectrum communications based on CDMA. Therefore, aiming at the needs of communication and the characterist...

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Problems solved by technology

[0004] The same-frequency network improves the spectrum utilization and also brings about the same-frequency interference, and the same-frequency interference has caused unprecedented difficulties for signal demodulation. In order to complete the signal demodulation under the same-frequency network, the present invention proposes A generalized joint detection and demodulation device and method

[0005] As one of the key technologies of TD-SCDMA, joint detection has been widely used. Its basic idea is to combine all user information in the current working cell, eliminate unwanted users as interference, and eliminate MAI (multiple access interference) for desired users. and ISI (Inter-Symbol Interference), to get better demodulation results; when there is co-frequency interference, even if joint detection eliminates all interference in this cell, the impact of other co-frequency cells is still very large, seriously interfering with this cell The demodulation result of

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