a receiver

A technology of receiver and memory, which is applied in the field of communication, and can solve the problems of large time delay of the sequence alignment method, etc.

Active Publication Date: 2019-03-05
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a receiver, aiming to solve the problem of large time delay in existing sequence alignment methods

Method used

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Embodiment Construction

[0022] figure 1 For an example of an OFDM communication system, figure 1 Among them, the communication medium between the central office and the terminal includes copper twisted pair, and the multi-port layout adopts vector Vector technology to offset various crosstalk between different lines. It should be ensured that discrete multi-carrier (Discrete Multi-Tone, DMT) symbols of each port are also aligned. figure 1 Among them, a sine wave represents a time-domain sequence of a symbol. Due to the different line length delays and the different delays in the internal processing of each central office and terminal, when the central office or terminal samples the channel time-domain sequence, there will be a gap between multiple ports. There is a delay.

[0023] This application proposes a receiver that can be used in figure 1 shown in the terminal or central office. The purpose is to align the sequences received by different ports with the preset reference sequence, so as to r...

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Abstract

The invention provides a receiver. The receiver comprises an alignment control unit, m transmission paths, a multi-path register selection control unit, a sign pulse generator and a storage unit, wherein the alignment control unit is used for generating an alignment control signal comprising a phase value and an offset value; the multi-path register selection control unit is used for generating a selection signal of the m transmission paths according to the phase value; any one of the m transmission paths outputs a received sequence under the condition that the received selection signal is a first value, and outputs the received sequence after delaying the sequence by a sampling point under the condition that the received selection signal is a second value; the sign pulse generator is used for transmitting a pulse signal after delaying preset pulse transmitting time by sampling points with the quantity of the offset value; the storage unit is used for storing a splicing sequence of the sequences output by the m transmission paths after receiving the pulse signal. According to the receiver, parallel processing of the sequences is realized, so that processing time delay can be reduced.

Description

technical field [0001] The present application relates to the communication field, and in particular to a receiver. Background technique [0002] The channel coding and decoding and modulation and demodulation methods based on the principle of Orthogonal Frequency Division Multiplexing (OFDM) have been widely used in various wired and wireless communication fields. OFDM technology has high spectrum utilization and is resistant to code gaps. Strong crosstalk and other advantages, and the use of modern digital signal processing technology is easy to implement, and also has the advantages of low cost and low power consumption. [0003] OFDM technology divides the available frequency spectrum of the entire system into many subcarriers, and each subcarrier can carry different sequence quantities according to the quality of the transmission channel. Therefore, after the start of the OFDM system, a set of handshake and initialization mechanisms need to be established between the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16
CPCH04B1/16
Inventor 李阳林灏勋
Owner HUAWEI TECH CO LTD
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