Uplink MIMO-LDPC modulation and demodulation system

A demodulation system, LDPC code technology, applied in diversity/multi-antenna systems, error correction/detection using block codes, space transmit diversity, etc., can solve the problems of non-convergence, reduced data transmission rate, occupancy, etc.

CN101567717AInactive Publication Date: 2009-10-28BEIJING JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2009-10-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an uplink MIMO space-time encoding and decoding baseband system. In a cell covered by an MIMO base station, different mobile stations are located in different spatial positions, and different signal channel parameter matrixes can be obtained. The mobile station conducts LDPC coding and radio frequency modulation to the base-band signal and then emits the base-band signal. An MIMO base station receiver conducts radio frequency demodulation to received signals, then uses channel matrix parameters from different mobile stations to the base station to conduct space demodulation to the base-band signal, and then conducts LDPC decoding to obtain restored data. The invention provides an uplink MIMO space-time encoding and decoding base-band system circuit which applies the method. The adoption of the invention enables each connection user to obtain two independent space channels, thus improving the spectrum utilization rate of a wireless communication system and simplifying the design of an MIMO mobile station transmitter.
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Description

technical field

[0001] The invention relates to a multiple-input multiple-output (MIMO) wireless communication system, especially an uplink MIMO-LDPC baseband modulation and demodulation system. Background technique

[0002] MIMO (Multiple-Input Multiple-Out-put) represents the multiple-input multiple-output technology of a multi-antenna wireless communication system, and the MIMO technology uses multiple antennas to suppress channel fading. According to the number of antennas at both ends of the transceiver, compared to the ordinary SISO (Single-Input Single-Output) wireless communication system, the MIMO wireless communication system can also include SIMO (Single-Input Multiple-Output) wireless communication system and MISO (Multiple-Input Single-Output) wireless communication system -Output) wireless communication system. MIMO technology has been considered for 802.11n and 802.16e wireless communication systems. 802.11n and 802.16e are IEEE802.1x standards. 802.11n and ...

Examples

Embodiment Construction

[0114] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0115] figure 1 It is a block diagram of MIMO channel and uplink MIMO-LDPC modulation and demodulation system. Such as figure 1 As shown, the mobile station transmitter transmits the radio frequency modulation signal t(s 1 (k) ) and t(s 2 (k) ), where s 1 (k) and s 2 (k) For encoding signals with LDPC codes, see figure 2 ,

[0116] s 1 ( k ) = b 1 ( k ) G 1 = p 1 ( k ) ...