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Method for reducing channel estimation false-alarm probability in TD-SCDMA mobile communication system

A technology of TD-SCDMA and mobile communication systems, applied in the field of channel estimation, can solve problems such as wrong high-level parameter adjustment, interference, and reduced system processing efficiency, and achieve the effect of reducing the false alarm rate

Inactive Publication Date: 2009-06-10
ZTE CORP
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the setting of the above-mentioned post-processing detection threshold is the optimal value based on the premise that there must be a transmitted signal in this time slot. If the transmitted signal does not necessarily exist in this time slot, for example, discontinuous transmission is used in the TD-SCDMA mobile communication system DTX technology, the existing threshold detection post-processing method will lead to a large number of misjudgments in the time slots without transmitting signals, that is, noise or interference will be misjudged as signals, and subsequent unnecessary joint detection and other processing will be performed, which is extremely difficult. It wastes precious system resources and reduces the processing efficiency of the system; at the same time, because no transmission signal is misjudged as a transmission signal, the quality of the signal is too poor, which seriously interferes with Radio Resources Control (RRC) etc. The judgment of link quality by some high-level protocols leads to some wrong high-level parameter adjustments, such as wrong outer loop power control adjustments, etc., which in turn reduces the performance of the entire system

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  • Method for reducing channel estimation false-alarm probability in TD-SCDMA mobile communication system
  • Method for reducing channel estimation false-alarm probability in TD-SCDMA mobile communication system
  • Method for reducing channel estimation false-alarm probability in TD-SCDMA mobile communication system

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Embodiment Construction

[0024] Below in conjunction with the accompanying drawings, taking the base station receiver of the TD-SCDMA mobile communication system as an example, the specific implementation of the method of the present invention will be further described in detail. This technical solution can be extended to base stations and terminals of other UMTS Terrestrial Radio Access Time Division Duplex (UTRATDD) mobile communication systems, and even any mobile communication system that uses training sequences for channel estimation.

[0025] Fig. 1 is a schematic diagram of the conventional time slot structure of the physical layer of the TD-SCDMA mobile communication system. As shown in Figure i, the conventional time slots of the TD-SCDMA mobile communication system physical layer include data symbols (Data symbols), training sequences (Midamble), synchronization shift symbols (SynchronizationShift symbols, referred to as SS symbols), transmit power control symbols ( Transmit PowerControl sym...

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Abstract

Through bran-new post-processing approach of dual detection thresholds, using CRC checking information after TTI demodulating and decoding, and decided result of dual detection thresholds, the disclosed method determines whether there is a transmitted signal or not. Thus, the method reduces misjudge probability (i.e. false alarm rate) of post-processing approach of channel estimation greatly without reducing sensitivity of receiving signal when no signal is transmitted. The invention raises performance and processing efficiency of TD - SCDMA mobile communication system.

Description

technical field [0001] The present invention relates to a method for channel estimation in a mobile communication system, in particular to a third-generation Time Division-Synchronous Code Division Multiple Access (Time Division-Synchronous Code Division Multiple Access) (hereinafter referred to as TD-SCDMA) mobile communication system based on time division duplexing A method for processing a false alarm rate after reducing a channel estimation threshold by applying a Discontinuous Transmission (DTX) technology. [0002] The invention can be applied to the base station receiver of the TD-SCDMA mobile communication system, and can also be applied to the user terminal receiver. Background technique [0003] TD-SCDMA mobile communication system is a third code division multiple access digital mobile communication system based on time division duplex, which involves many key technologies, such as: joint detection technology, smart antenna beamforming technology, synchronization...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L1/00
Inventor 耿鹏江海
Owner ZTE CORP