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A diversity receiver

A receiver and branch technology, applied in the field of receivers, can solve the problems of poor decoding effect of Viterbi decoder and inability to provide channel background noise, etc., and achieve the best decoding effect

Inactive Publication Date: 2007-05-23
SILICON INTEGRATED SYSTEMS
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0017] However, the channel equalizer of each branch of the general diversity receiver sets its channel weight (Channelweight) equal to the channel weight of other branches, so the known diversity receiver only provides the channel information (Channel information) to the Viterbi decoder , and cannot provide the background noise (Background noise) part of each channel
As a result, the Viterbi decoder will decode poorly

Method used

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Embodiment Construction

[0024] The following describes the diversity receiver of the present invention in detail with reference to the drawings, and assumes that n, k, N, M, P, and Q are positive integers, and 1PN, 1QM.

[0025] Fig. 2 is a diagram showing a diversity receiver of the present invention. The diversity receiver 20 is provided with N branches 21-2N for receiving M versions of the input signal I 1 (n,k)-I M (n, k), where I Q (n, k) is the Qth version input signal of the nth symbol and the kth subcarrier transmitted by the transmitter (not shown). The diversity receiver 20 includes N Fourier transform circuits 111-1N1, N channel state information estimators 112-1N2, N channel equalizers 113-1N3, N soft bit reverse mappers 114-1N4, N Noise power estimator 211-2N1, N multipliers 212-2N2, a diversity combining selection unit 2a, and a channel decoder 2b.

[0026] The Fourier transform circuit 111-1N1 is separately provided in each branch 21-2N. The Pth Fourier transform circuit 1P1 recei...

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Abstract

The invention relates to a grouped receiver, wherein it uses one noise power evaluator to provide background noise of each signal channel in following channel decoder. The invention can solve background noise, to obtain enough information for channel decoder and improve decode effect.

Description

technical field [0001] The present invention relates to a receiver, in particular to a diversity receiver applied to an Orthogonal Frequency Division Multiplexing system. Background technique [0002] Orthogonal frequency division multiplexing (OFDM) system in order to solve inter-carrier interference (Interference) and rapid channel attenuation (selective frequency attenuation), which seriously affects the performance of the system, etc. Use diversity reception technology to overcome. The diversity reception technology is widely used, especially when the technology is applied to mobile reception (Mobile reception), it can have a very good effect. Generally speaking, a diversity receiver includes at least two antennas (antenna) and subsequent signal processing, wherein the subsequent signal processing part is used to combine the input signals of different paths, and the two antennas are placed separately to receive different versions (Version ) of the same transmitted sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04L27/26
Inventor 曾雅蒂侯文生
Owner SILICON INTEGRATED SYSTEMS
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