SLM (Selected Mapping) method of SFBC (Space Frequency Block Coding) MIMO-OFDM (Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing) system based on F matrix

A matrix and square matrix technology is applied in the field of reducing the peak-to-average ratio of MIMO-OFDM systems based on SFBC. The effect of computational complexity

What is AI technical title?
AI technical title is built by PatSnap AI team. It summarizes the technical point description of the patent document.
A matrix and square matrix technology is applied in the field of reducing the peak-to-average ratio of MIMO-OFDM systems based on SFBC. The effect of computational complexity

CN103312652AInactive Publication Date: 2013-09-18SOUTHWEST PETROLEUM UNIV

4 Cites 13 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.

Viewing Examples

Smart Image

Examples

Experimental program

Comparison scheme

Effect test

Embodiment Construction

[0034] Provide the specific implementation method of the present invention below, take sending antenna T=2 as example:

[0035] Step 1 Input the binary data bit stream, modulate with PSK / QAM to obtain the mapped signal, and obtain X after serial-to-parallel conversion i Frequency domain signal, X i Represents the i-th frequency-domain symbol:

[0036] x i =[X 0 ,X 1 ,......,X N-1 ] T (1)

[0037] Among them, N represents the number of subcarriers, the upper limit of i is set to P (P>0), [ ] T Represents the transpose of a matrix;

[0038] Step 2 uses the F matrix in formula (2) to generate the initial phase sequence group:

[0039] F = 1 k I ( N ) + 1 N rand ( N ) - - - ( 2 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to View More

PUM

Login to View More

Abstract

The invention discloses an SLM (Selected Mapping) method of an SFBC (Space Frequency Block Coding) MIMO-OFDM (Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing) system based on an F matrix, solving the problems of high peak-to-average power ratio and high computation complexity of SFBCMIMO-OFDM signals in the MIMO-OFDM system. An algorithm for lowering the peak-to-average ratio and the calculation complexity of the system is provided by researching the orthogonality of SFBC coding-based signals on antennas in an MIMO system. According to the SLM method of the SFBC MIMO-OFDM system based on the F matrix, the SFBC signals are processed by utilizing the F matrix of a given phase sequence; an obtained optimal phase factor is subjected to quadrature encoding and acts on the SFBC signal of each antenna; in such a way, the to-be-sent signal on each antenna can be prevented from being subjected to IFFT (Inverse Fast Fourier Transform) for multiple times; and therefore, the calculation complexity of the system is lowered. Meanwhile, by the adoption of the F matrix, the MIMO-OFDM system obtains a good peak-to-average ratio performance.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to an SLM method for reducing the peak-to-average ratio of MIMO-OFDM systems based on SFBC. Background technique [0002] Orthogonal frequency division multiplexing technology (OFDM) is widely used in digital audio broadcasting (DAB), digital video broadcasting (DVB), wireless local area network (WLAN), and its high spectrum utilization rate, anti-multipath interference and other advantages can effectively eliminate signal interference , so it has received more and more attention. Multiple-input multiple-output (MIMO) can increase the channel transmission rate and obtain higher diversity gain or capacity gain by configuring multiple antennas on both the transmitting and receiving sides. The combination of the two technologies in wireless communication is MIMO-OFDM (Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing), in which OFDM can convert frequency-sel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to View More

Application Information

Patent Timeline

18 Sep 2013

Publication

CN103312652A

IPC: H04L27/26; H04L1/06

Inventors: 罗仁泽; 李芮