Method for improving signal transmission rate in mobile communication system

Inactive Publication Date: 2006-11-15
HUAWEI TECH CO LTD
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Problems solved by technology

[0013] In practical applications, the above scheme has the following problems: According to the current implementation scheme of the forward link in the 1x EV-DO system, the maximum forward peak rate supported by the 5MHz bandwidth does not meet the requirements
However, if the forward link of the current 1x EV-DO system is implemented, since the peak rate of the forward link on the single carrier is not changed, only four 1.2288Mcps carriers can be provided on the 5MHz bandwidth
[0015] In this case, the maximum forward peak rate that can be supported is only 3.072Mbps×4=12.288Mbps, therefore, the minimum peak rate of 14.4Mbps required by the demand cannot be achieved

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  • Method for improving signal transmission rate in mobile communication system
  • Method for improving signal transmission rate in mobile communication system
  • Method for improving signal transmission rate in mobile communication system

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[0041] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042]In general, the main point of the present invention is that in the third-generation mobile communication system, signal modulation and demodulation are performed through a non-uniform QAM constellation close to Gaussian distribution, so that the distribution of the input signal is more in line with the Gaussian distribution. Make the channel capacity reach the theoretical limit, thereby effectively increasing the rate of the air interface.

[0043] The method for increasing the signal transmission rate in a mobile communication system according to an embodiment of the present invention is applied to the single-carrier forward traffic channel of the CDMA 2000 1x EV-DO system.

[0044] In this embodiment, the sender uses the quadrature amplitude modulation non-u

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Abstract

The invention relates to mobile communication technique, disclosing a method for raising signal transfer rate in mobile communication system, raising signal transfer rate of an aerial interface. And it uses nonuniform QAM constellation map close to Gauss distribution to make signal modulation and demodulation, where the nonuniform QAM constellation map can be obtained by 'Monte Carlo' method, and in the simulating course, it uses at least a random number sequence according with Gauss distribution. And for the single-carrier forward service channel of CDMA2000 1x EV-DO system, it can raise forward peak value rate of the single carrier in a grouping form of (6144, 1, 64).

Description

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Application Information

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Owner HUAWEI TECH CO LTD
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