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Keying modulation method based on transmit diversity

A technology of transmit diversity and modulation method, which can be applied in the direction of phase modulation carrier system, digital transmission system, electrical components, etc., and can solve problems such as reducing spectral efficiency.

Inactive Publication Date: 2014-08-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

Space-time SSK-based technology uses multiple time slots to transmit a data, so the spectral efficiency of the system decreases gradually with the increase of slots

Method used

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  • Keying modulation method based on transmit diversity
  • Keying modulation method based on transmit diversity
  • Keying modulation method based on transmit diversity

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Embodiment Construction

[0022] Specific embodiments of the present invention will be given below in conjunction with the accompanying drawings. It should be noted that the parameters in the examples do not affect the generality of the present invention.

[0023] Consider the link of the traditional space-shift keying SSK system, such as figure 1 Shown: Traditional SSK system has N t root transmit antenna and N r Root receiving antenna. After channel coding, interleaving and other processing, the data c to be sent is generated, and the data c enters the SSK bit mapper to select the serial number of the sending antenna, and then activates the corresponding antenna to send the signal.

[0024] The traditional SSK system has only one antenna active at a certain time, so the transmitted signal can be written in the matrix form x=[00...1...0], and the transmitted signal x passes through N t Send N r The received MIMO channel and Gaussian white noise channel arrive at the receiving end.

[0025] The s...

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Abstract

The invention discloses a keying modulation method based on transmit diversity. According to the method, a transmit diversity mode is combined with traditional SSK modulation as the basis for transmission and receiving. Multiple time slots are adopted at an emission end to send the same data, different antenna mapping methods are adopted in different time slots, and meanwhile, different time slots activate sending symbol combinations of an antenna to bear a part of extra data information. Accordingly, the method is an SSK modulation transmission mode based on spatial diversity. Compared with traditional SSK, the diversity mode that the time slots send the same data is adopted, so that bit error rate performance of a system is improved. The system has high diversity gain due to the fact that different mapping modes are adopted in the time slots. Sending symbols on different time slots carry sending information, so that frequency efficiency of the system is further improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to multiple input multiple output (Multiple Input Multiple Output, MIMO) technology, in particular to a Space Shift Keying (SSK) MIMO method based on transmit diversity. Background technique [0002] As one of the key technologies in the future wireless communication field, multiple-input multiple-output technology has greatly improved the spectral efficiency (Spectrum Efficient, SE) of the system. MIMO technology based on space shift keying modulation is considered to be one of the important technologies in the future 5G system. one. [0003] The idea of ​​SSK technology is different from traditional MIMO technology in that traditional MIMO uses APM (Amplitude / Phase Modulation) modulation symbols to carry the transmitted binary data information, while SSK uses space shift keying modulation to carry the transmitted binary data information. The system block diagram Such as ...

Claims

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Application Information

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IPC IPC(8): H04L27/18H04L1/00
Inventor 方舒李磊巫健李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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