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Iteration channel estimation method and device

A channel estimation and iterative technology, applied in channel estimation, baseband system components, etc., can solve problems such as complex algorithms and large network delays

Inactive Publication Date: 2017-04-05
ZTE CORP
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Problems solved by technology

It is not difficult to find that the work of the existing iterative receiver is based on the joint detection technology of demodulation and decoding, the algorithm is relatively complex, and the network delay is large

Method used

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  • Iteration channel estimation method and device
  • Iteration channel estimation method and device
  • Iteration channel estimation method and device

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Embodiment Construction

[0084] The specific implementation manner of the present invention will be further described in detail below with reference to the drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0085] Such as figure 1 As shown, the iterative channel estimation method in Embodiment 1 of the present invention includes:

[0086] Step 11: Receive the detection signal sent by the sending end.

[0087] Step 12: Detect the detection signal to obtain demodulated hard bits and demodulated soft bits.

[0088] In the embodiment of the present invention, any detection method in the prior art may be used to detect the detection signal. By detecting the detection signal, the hard bits and the soft bits are demodulated.

[0089] Step 13. Obtain a demodulated output signal-to-noise ratio parameter according to the demodulated soft bits.

[0090] In this embodiment of the present invention,...

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Abstract

The invention provides an iteration channel estimation method and device, and relates to the technical field of communication. The method and device are used for reducing the complexity of an iteration channel estimation algorithm, and reducing the network time delay. The method comprises the steps: receiving a detection signal transmitted by a transmitting end; detecting a detection signal, and obtaining a demodulation hard bit and a demodulation soft bit; obtaining the parameter of a demodulation output SNR (Signal to Noise Ratio) according to the demodulation soft bit; obtaining an iteration discrimination threshold value, and comparing the parameter of the demodulation output SNR with the iteration discrimination threshold value; obtaining a feedback channel signal if channel iteration is determined to be carried out according to a comparison result, and obtaining an iteration output signal through the demodulation hard bit and the feedback channel signal. The method is mainly used in channel estimation.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to an iterative channel estimation method and device. Background technique [0002] As a typical representative of the second generation (2G) mobile communication system, the GSM (Global System for Mobile Communication) system has experienced more than 20 years of development. How to further enhance user perception and improve call quality without significantly increasing equipment load and reducing system capacity is a key topic for 2G system maintenance and improvement at this stage. [0003] For a communication system based on TDMA ((Time Division Multiple Access) frame structure type, the transmitting end usually adopts coding and interleaving technology to resist the multipath fading existing in the air interface transmission; the receiving end uses the estimated channel pulse In response, an equalizer based on ML (Most Likelihood, maximum likelihood) or...

Claims

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Application Information

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IPC IPC(8): H04L25/02
CPCH04L25/02H04L25/024
Inventor 叶峰
Owner ZTE CORP
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