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High throughput retransmission method based on sawtooth decoding

A high-throughput, retransmission technology, applied in the transmission system, digital transmission system, error prevention, etc., can solve the problem that the channel utilization rate is not very high, and achieve the effect of improving throughput

Active Publication Date: 2020-11-17
江苏银丰信息技术有限公司
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Problems solved by technology

However, the channel utilization rate of both is not very high and cannot meet the requirements of current wireless communication.
[0005] One of the disadvantages of using CSMA / CD media access control is that when each computer interconnected in the LAN has only a small amount of data to transmit, each site in the network shares the media almost fairly; but if a site needs When sending large amounts of data (such as in the case of a station acting as a high-quality video source) it is possible for a station to control the entire LAN for a long time

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  • High throughput retransmission method based on sawtooth decoding
  • High throughput retransmission method based on sawtooth decoding
  • High throughput retransmission method based on sawtooth decoding

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the description of the drawings and specific embodiments.

[0022] A high-throughput retransmission method based on sawtooth decoding, the system model of which is as follows:

[0023] Such as figure 1 As shown, K single-antenna users whose positions are scattered with each other, denoted by {1,2,...,K}, respectively transmit data to the receiving end. The receiving end is equipped with M dispersed (not in the same position) receiving antennas, represented by {1,2,...,M}. Scattered users and antennas make the transmission time of each path different. User k wants to send a packet containing L modulation symbols, using means that x k,l Indicates the lth modulation symbol in this packet. Initially consider binary phase shift keying (binary phase shift keying, BPSK) modulation, that is, x k,l ∈{+1,-1} (with the information bit s in the DS system k,l ∈{0,1} differs by x k,l Can be seen as s ...

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Abstract

The present invention provides a high throughput retransmission method based on sawtooth decoding. The method comprises the steps of forming a delay matrix T(M*K) at a receiving end, and then processing at the receiving end according to the following steps of decomposing T: suppose T is an indecomposable matrix, T needs to be decomposed into two matrix T<D> and T<R>, T<D> is decomposable and T<R> is a matrix except T<D> in the T matrix; and repeating and iterating constantly by using a greedy algorithm so as to get a maximum decomposable matrix from the T<R> to make T decomposable eventually. The method has the beneficial effect of improving the system throughput.

Description

technical field [0001] The present invention relates to wireless communication, in particular to a high-throughput retransmission method based on sawtooth decoding. Background technique [0002] The basic principle of Serial Interference Cancellation (SIC) is to gradually subtract the interference of the user with the maximum signal power. The SIC detector judges the data of multiple users one by one in the received signal, and subtracts the interference caused by the user signal at the same time when a user is judged. For multiple access interference (MAI), operations are performed in the order of signal power, and signals with higher power are operated first. In this way, the loop operation has been carried out until all the multiple access interference is eliminated. [0003] CSMA / CD (Carrier Sense Multiple Access with Collision Detection) is the carrier sense multiple access technology with collision detection (carrier sense multiple access / collision detection). Its wo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04L1/00
CPCH04L1/0047H04L1/1607
Inventor 代明军金于君毛白露王晖林晓辉陈彬
Owner 江苏银丰信息技术有限公司