Transmitter and signal transmission method

A signal transmission and transmitter technology, applied in the field of signal processing, can solve the problem of not being able to achieve full diversity gain and coding gain at the same time, and achieve the effect of achieving full gain and reducing design requirements.

Active Publication Date: 2009-07-01
LENOVO (BEIJING) LTD +1
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to provide a signal transmission method and a transmitter to solve the technical problem that the prior art cannot realize full diversity gain and coding gain at the same time

Method used

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  • Transmitter and signal transmission method
  • Transmitter and signal transmission method
  • Transmitter and signal transmission method

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Embodiment Construction

[0026] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the specific embodiments will be described in detail below with reference to the accompanying drawings.

[0027] In the embodiment of the present invention, space-time block coding is adopted at the front end of the transmitter, and after the OFDM modulation is performed on the output result of the coding, cyclic delay diversity processing is performed on the output OFDM signal at the back end, and the cyclic delay diversity processing has delay samples in the cyclic delay diversity processing. A soft control switch is added to the line. It combines the advantages of cyclic delay diversity and space-time block coding, overcomes their shortcomings, and has certain compatibility.

[0028] image 3 and Figure 4 The basic schematic diagrams of 2×2STBC and 4×4STBC and cyclic delay diversity combined transmission, such as image 3 and Figure 4 As show...

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Abstract

The invention provides a signal transmission method and a transmitter thereof, which belong to the technical field of transmitter-side signal processing. The method comprises the following steps: performing space-time block coding of a bit stream; modulating the space-time block coding result by means of orthogonal frequency division multiplexing (OFDM), and treating the OFDM result by means of cyclic delay diversity. The signal transmission method achieves the effects of full diversity gain and coding gain at the same time.

Description

technical field [0001] The present invention relates to a signal processing technology at the transmitter end of a communication system, in particular to a signal transmission method and a transmitter. Background technique [0002] CDD (cyclic delay diversity, cyclic delay diversity) is a technology that uses frequency diversity to achieve the effect of transmit diversity through signal processing at the transmitter. Combined with forward error correction coding and other technologies, CDD can not only obtain partial coding gain, effectively reduce BER (Bit Error Rate, bit error rate), but also reduce the complexity of receiver design, and can be flexibly configured during the transmission process. The number of transmitter antennas is a practical and effective multi-antenna transmission technology, but it is difficult to achieve full diversity gain; STBC (Space Time Block Code, Space Time Block Code) is another important multi-antenna transmission technology , its features...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00H04L27/26
CPCH04L1/0059H04B7/068H04L1/0643H04B7/0671H04L1/0068H04B7/0669
Inventor 任俊
Owner LENOVO (BEIJING) LTD
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