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Binary digital signal space shift keying modulation and demodulation method for multi-input multi-output system

A digital signal and space-shift keying technology, applied in transmission systems, digital transmission systems, phase-modulated carrier systems, etc., can solve problems such as the gap in spectral efficiency, the inability to arbitrarily adjust the number of transmitting antennas and the number of streams transmitted at the same time, Achieve the effect of low bit error rate performance, flexible modulation method and wide application range

Inactive Publication Date: 2014-02-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the above method is only for a fixed antenna configuration, and cannot arbitrarily adjust the number of transmitting antennas and the number of streams transmitted at the same time, and there is still a gap between the spectral efficiency achieved by the traditional VBLAST algorithm.

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  • Binary digital signal space shift keying modulation and demodulation method for multi-input multi-output system
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  • Binary digital signal space shift keying modulation and demodulation method for multi-input multi-output system

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Embodiment

[0059] Here, the number of transmitting antennas is 7, and the number of receiving antennas is 4, that is, N t =7,N r =4 MIMO system as an example to illustrate:

[0060] Assume that the system transmits K=4 channels of data in total, and each channel of data contains b=2 bits, that is, the system sends data in groups of Kb=8 bits. Here it is assumed that the 8bit data sent is 11010110. First calculate the original antenna mapping number corresponding to the 4 channels of data. The calculation rule is to convert binary to decimal and add 1 to get n 1 =4,n 2 =2, n 3 =2, n 4 =3. For the system with K=4, the modulation symbols use 4QAM symbols, that is, the modulation symbols of 4 antennas are

[0061] The first data stream modulation, first sort the 7 antennas Antenna number set A is {T 1 , T 2 , T 3 , T 4 , T 5 , T 6 , T 7}, the set B of available antenna numbers is {1, 2, 3, 4, 5, 6, 7}, and set A corresponds to set B one by one. Because the original antenna...

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Abstract

The invention relates to the field of wireless communications, and discloses a binary digital signal space shift keying modulation and demodulation method for a multi-input multi-output system. The multi-input multi-output system comprises Nt transmitting antennas and Nr receiving antennas. The input data is divided into K data streams to carry out SSK (Space Shift Keying) modulation; according to the transmitting antennas corresponding to the original mapping serial number from n1, n2 to nK of the K data streams on the Nt transmitting antennas, K modulation symbols are respectively mapped to the different transmitting antennas and transmitted. The invention further provides a corresponding demodulation method. The modulation and demodulation method can greatly improve the spectrum efficiency of the SSK technology, and under the same frequency efficiency, can achieve lower error rate performance than the traditional VBLAST (Vertical Bell Layered Space Time) system.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a binary digital signal space-shift keying modulation and demodulation method of a multiple-input multiple-output system. Background technique [0002] Multiple Input Multiple Output (MIMO) technology, as one of the key technologies in the future wireless communication field, greatly improves link reliability and system spectral efficiency (Spectrum Efficient, SE). A typical MIMO system is the layered space-time structure (VBLAST structure) proposed by Bell Laboratories. [0003] The VBLAST structure adopts a method in which multiple signals are multiplexed in space, and all antennas transmit signals at the same time. However, this method increases the throughput of the system and also generates inter-channel interference (ICI). At the same time, the complexity of the maximum likelihood detection algorithm (ML) increases exponentially with the increase of the transmitting ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/18H04L1/00
Inventor 李磊方舒巫建
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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