Receiving method of deleting parallel subchannel transmitting interference
A technology of channel transmission and reception method, which is applied in the field of reception to delete parallel sub-channel transmission interference, can solve the problems of small frequency band utilization, sub-channel interference, weak transmission capacity, etc., achieve excellent bit error rate, eliminate interference, and delete interference The effect of algorithm simplification
Inactive Publication Date: 2008-04-09
BEIJING UNIV OF POSTS & TELECOMM +1
View PDF0 Cites 9 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] MIMO schemes based on space division multiplexing, such as V-BLAST, can provide considerable frequency band utilization when the number of transmitting antennas is less than or equal to the number of receiving antennas. This technology is suitable for rich scattering channels. If the wireless channel correlation increases, then its performance will deteriorate
[0004] The scheme based on transmit diversity and the MIMO scheme based on transmit weighting can obtain very low bit errors and is not sensitive to the requirements of channel correlation, but its frequency band utilization is relatively small and the transmission capacity is slightly weak
[0005] The MIMO scheme based on SVD or EVD decomposition transforms the MIMO channel into parallel sub-channels, which can theoretically achieve the channel capacity of the MIMO system. However, the sender needs to know the channel information accurately, otherwise interference will be introduced between each sub-channel, which will deteriorate the performance.
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] The present invention focuses on the MIMO technology in which the transmitting end implements transmission weighting and the receiving end implements receiving weighting. Therefore, among the above-mentioned MIMO technologies, the most closely related to the present invention is the MIMO technology based on SVD or EVD decomposition. Therefore, the MIMO technology based on SVD decomposition The technical introduction is as follows:
[0030] Consider the case where the system experiences flat fading, or frequency selective fading on one (group) subcarrier of an OFDM system. Suppose the MIMO system uses M T transmit antennas and M R receiving antennas for data transmission. Assumed by M T transmit antennas and M R The rank of the MIMO channel matrix H formed by receiving antennas is k, where K≤min(M T ,M R ). The number S of spatial sub-channels used is determined by the eigenvalue characteristics of the MIMO channel matrix H and the system throughput requirements. ...
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 a receiving method of deleting the interference of parallel sub-channel transmission, which includes the steps as following: a receiver at the receiving end performs transmission channel estimation; the receiver uses the result of the transmission channel estimation to reconstructs a transmission interference matrix according to the transmission weighted matrix and the receiving weighted matrix; according to the reconstructed transmission interference matrix, delete the interference between parallel sub-channels by using the iterative method; demodulate the data of each sub-channel. According to the invention, the interference-deleting technology is simplified, and some properties such as the excellent bit error rate and throughput etc. are obtained. Besides, the invention is insensitive to the spatial correlation characteristics of MIMO channel, and thus, under various channel situations, the channel capacity of the corresponding MIMO channel can be closed to, with strong applicability.
Description
technical field [0001] The invention provides a receiving method capable of canceling transmission interference of parallel sub-channels. Background technique [0002] Multi-antenna technology can provide higher frequency band utilization, and is a hot research topic in the current wireless communication field. At present, the most important multi-antenna technologies include schemes based on space division multiplexing (SDM), such as: D-BLAST, V-BLAST; schemes based on transmit diversity, such as: STTC, STBC; MIMO schemes based on transmission weighting and schemes based on MIMO solutions for SVD or EVD decomposition, etc. [0003] MIMO schemes based on space division multiplexing, such as V-BLAST, can provide considerable frequency band utilization when the number of transmitting antennas is less than or equal to the number of receiving antennas. This technology is suitable for rich scattering channels. If the wireless channel correlation increases, then Its performance ...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04B1/707H04L1/06H04L27/26
Inventor 李立华武平张新宇陶小峰张平关宏之
Owner BEIJING UNIV OF POSTS & TELECOMM