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Method and device for adaptively adjusting subcarrier group rate in subcarrier communication system

An adaptive adjustment and communication system technology, applied in the modulation carrier system, adjusting the transmission rate, transmission system, etc., can solve the problems of low transmission efficiency, no consideration of carrier transmission performance differences, and poor anti-interference performance of sub-carriers.

Inactive Publication Date: 2006-04-05
PANASONIC CORP
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this approach is that it does not consider the difference in transmission performance of each subcarrier due to frequency selective fading
If the transmission performance of a subcarrier is poor, but still uses the same rate as other subcarriers with better performance, the anti-interference performance of the subcarrier will be poor, and the transmission efficiency will be very low

Method used

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  • Method and device for adaptively adjusting subcarrier group rate in subcarrier communication system
  • Method and device for adaptively adjusting subcarrier group rate in subcarrier communication system
  • Method and device for adaptively adjusting subcarrier group rate in subcarrier communication system

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Embodiment Construction

[0036] figure 1 It is a structural block diagram of a traditional OFDM system transceiver. exist figure 1 In the transmitting end, the coding part 101 codes the information of the user, the coded information is interleaved through the interleaver 102, and then modulated in the modulation part 103. The modulated information is inserted into the pilot 104 in order to estimate the channel, then serial-to-parallel transformation 105 and inverse Fourier transformation 106, 107 are added to the modulated information with a guard interval and windowing to prevent interference between sub-carriers, and then through D / A-transform 108 sends the information to transmitter 109 for transmission.

[0037] At the receiving end, the receiver 111 receives the information sent by the transmitter, converts it from radio frequency to base frequency, and then undergoes A / D conversion 112, and after removing the guard interval 113, the information is sent to 114 for Fourier transformation. The ...

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Abstract

The invention provides a method for self-adaptive modulating the speed of sub-carrier wave group of sub-carrier wave communication system, and relative sending end, receiving end and communication system. Wherein, in the sending end, the information estimated by channel is transmitted to the sub-carrier wave group property analyzer (1011) which calculates the SIR value of each sub-carrier wave group according to the estimated result. Said SIR value is transmitted to the control command generator (1012) which can generate the information of speed and punching of said carrier wave group. On one side, these commands are needed to be stored for relative process when processing the serial-parallel conversion (1005) on the next received information, and on another side, these command information after the modulated of modulator (1013) will be fed back to the sending end by the emitter (1004).

Description

technical field [0001] The present invention relates to a method and equipment for adaptive adjustment of information rate in a mobile communication system, in particular to a method for adaptively adjusting subcarrier group rate in a subcarrier communication system, a sending end device, a receiving end device and a communication system. Background technique [0002] At present, with the development of theory and technology, many new technologies and applications have emerged in mobile communications, such as OFDM and MIMO. These new technologies can greatly improve the performance of mobile communication systems and meet people's requirements for wireless multimedia and high-speed data transmission. For example, Orthogonal Frequency Division Multiplexing (OFDM) divides a channel into many orthogonal sub-channels in the frequency domain, and the carrier spectrum of each sub-channel overlaps with each other, which improves the spectrum utilization. At the same time, the sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L5/0007H04L5/0046H04B2201/70701H04L5/006H04L1/0002H04L1/0009H04L1/0068H04L27/2628H04L27/2646H04L25/0202
Inventor 李继峰于小红
Owner PANASONIC CORP
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