Method and device for diversity signal sending

A technology of diversity transmission and signal, applied in the field of communication, which can solve the problem that the low peak-to-average ratio cannot be guaranteed

Inactive Publication Date: 2007-02-07
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The present invention provides a method and device for sending signals in diversity, which is used to solve t

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  • Method and device for diversity signal sending
  • Method and device for diversity signal sending

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Embodiment Construction

[0044]The present invention proposes a method and device for sending signals with diversity. The principle is that after the serial-to-parallel conversion of the input signal, the signal is divided into equal lengths to obtain two signals, and the Fourier transform is performed separately for subsequent processing. Through simulation It can be verified that the low peak-to-average ratio of the output signal is guaranteed in signal transmission in this way.

[0045] The method of the present invention comprises the following steps:

[0046] A. The input signal is serial-parallel converted;

[0047] B, the transformed signal is divided into equal-length two-way signals, and then the two-way signals are subjected to Fourier transform respectively; described Fourier transform is discrete Fourier transform or fast discrete Fourier transform;

[0048] C. Carry out space-frequency coding to the two signals after Fourier transform respectively;

[0049] D. The two signals after the ...

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Abstract

The invention relates to a method for grouped sending signal, which comprises: A, serially and parallel converting the input signal; B, dividing the converted signal into two paths with same length, then treating them with FFT; C, processing idle-frequency coding on the transformed signals; D, modulating the signals to be sent out via two antennas. The invention also provides a device for grouped sending signal. The invention, via FFT transforming and coding two paths of signals, can confirm the low-peak property of output signal.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for diversity sending signals. Background technique [0002] The Orthogonal Frequency Division Multiplexing (OFDM) technology in the communication field is to parallel-modulate the transmitted data symbols on multiple sub-carriers that are overlapped and orthogonal to each other. On the one hand, the serial-to-parallel conversion of data symbols will increase the symbol period on each subcarrier relatively, which can minimize the impact of time dispersion on the system caused by the multipath delay extension of the wireless channel, and avoid frequency selection. On the other hand, the orthogonality between subcarriers can effectively utilize the bandwidth and improve the system capacity. At the same time, in order to avoid symbol interference between symbols, a cyclic prefix or guard interval is inserted between symbols to eliminate intersymbo...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B7/02
Inventor 葛绍伟
Owner HUAWEI TECH CO LTD
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