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Soft regulating method and soft regulating system suitable for high-speed downlink grouped access service

A technology for accessing services and soft demodulation, applied in transmission systems, multi-carrier systems, digital transmission systems, etc., it can solve the problems of increased processor overhead, reduced processing speed, and many parameters, and achieves a reduction in parameters and computation. Effect

Active Publication Date: 2009-10-28
SANECHIPS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods involve many parameters in the calculation process, and the amount of calculation is large, which increases the overhead of the processor and reduces the processing speed, and cannot meet the higher requirements of HSDPA transmission of high-speed data.

Method used

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  • Soft regulating method and soft regulating system suitable for high-speed downlink grouped access service
  • Soft regulating method and soft regulating system suitable for high-speed downlink grouped access service
  • Soft regulating method and soft regulating system suitable for high-speed downlink grouped access service

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0029] The present invention provides a soft demodulation method suitable for high-speed downlink packet access services, refer to Figure 5 The flowchart shown:

[0030] 100. Receive the output data of the joint detector;

[0031] 200. Record the output data of the joint detector as JD_Output(i, j); the value ranges of the variables i and j are different according to the SF (Spreading Factor, spreading factor).

[0032] When SF=1, the value ranges of variables i and j are respectively:

[0033] i=1;

[0034] J=1,...,704;

[0035] When SF=16, the value ranges of variables i and j are respectively:

[0036] i=1,..., K_Active, wherein, K_Active is the number of active code channels;

[0037] j=1,...,44;

[0038] 300. Calculate the average amplitude value of the output data; this step includes the following steps:

[0039] 301: Ident...

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Abstract

The invention discloses a soft regulating method and a soft regulating system suitable for high-speed downlink grouped access service. The soft regulating method comprises the following steps: receiving outputted data of a union checker; calculating the average amplitude value of the outputted data; and carrying out subtraction between the average amplitude value and the outputted data to obtain the corresponding log-likelihood ratio. The invention utilizes the outputted data of the union checker, namely the data before being regulated for calculating out the average amplitude value. The corresponding log-likelihood ratio is obtained by the subtraction between the average amplitude value and the outputted data. Compared with the prior art, the soft regulating method reduces the parameter and the calculating amount in calculating.

Description

technical field [0001] The present invention relates to a method and system for time division synchronous code division multiple access mobile communication, in particular to a soft demodulation method and system suitable for high-speed downlink packet access services and performing 16-orthogonal amplitude modulation. Background technique [0002] In order to increase the transmission rate of downlink services, TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system, one of the mainstream standards of the third generation mobile communication, introduced HSDPA (High Speed ​​Downlink Packet Access, high speed downlink packet access) technology. HSDPA is a collection of some wireless enhancement technologies; its purpose is to meet the asymmetrical requirements of uplink / downlink data services, and can improve the downlink user peak rate and cell data throughput without changing the current TD-SCDMA network structure. Thereby improving system performance and...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L25/03H04L27/38H04L27/01H04L12/26
Inventor 陈玉
Owner SANECHIPS TECH CO LTD
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