Blind test method and device, uplink access method and device, receiver, transmitter and base station

A blind detection and symbol sequence technology, applied in the communication field, can solve the problems of performance degradation, performance deterioration, and complexity, and achieve the effect of meeting business requirements and improving reliability.

Active Publication Date: 2017-11-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strong cross-correlation sequence will cause the performance of blind detection based on matched filter to drop greatly. Inevitably, even the serial interference cancellation (Match-Filtered SIC) receiver based on matched filter will deteriorate seriously, and based on Blind detection of matched filtering, because it is based on exhaustion, when the sequence set is large, the complexity is very large
[0016] In the related technology, the traditional base station blind detection method has a problem that the blind detection performance is greatly reduced when a large number of machines are connected, and no effective solution has been proposed.

Method used

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  • Blind test method and device, uplink access method and device, receiver, transmitter and base station
  • Blind test method and device, uplink access method and device, receiver, transmitter and base station
  • Blind test method and device, uplink access method and device, receiver, transmitter and base station

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Embodiment 2

[0132] In this embodiment, a blind detection device is also provided, which is used to implement the above embodiments and preferred implementation modes, and what has already been described will not be repeated. As used below, the term "module" may be a combination of software and / or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

[0133] image 3 is a structural block diagram of a blind detection device according to an embodiment of the present invention, such as image 3 As shown, the device includes:

[0134] The demodulation and decoding module 30 is configured to serially demodulate and decode the data of each user from the received symbols, wherein the process of serially demodulating and decoding the data of each user includes:

[0135] Use the K L-length seque...

Embodiment 3

[0166] At the transmitting end, the signal is modulated by BPSK, and then spread with a binary 4-length non-orthogonal spread sequence in the complex domain, and the information bits and data bits of the indicated spread sequence are coded and modulated together, and assuming that the overload rate is 300%, then There are 12 users. On the receiving side, without knowing the spread sequence information, the base station uses an efficient blind detection algorithm to detect the received signal, and then demodulates, decodes, and CRCs the data whose SINR reaches the predetermined demodulation threshold; reconstructs the CRC decoding When the data stream is correct, firstly, the CRC correct data stream is coded and modulated; then, the modulated data symbols are spread, and the spreading sequence used is the same as that of the transmitting end; finally, the re-spreading data symbols Through the channel again, the channel coefficient is obtained by using a better joint channel est...

Embodiment 4

[0235] At the transmitting end, the signal is modulated by QPSK, and then spread with a binary 4-length non-orthogonal spreading sequence in the complex domain, and this indicates that the information bits and data bits of the spreading sequence are coded and modulated together, and assuming that the overload rate is 300%, then There are 12 users. On the receiving side, without knowing the spread sequence information, the base station uses an efficient blind detection algorithm to detect the received signal, and then demodulates, decodes, and CRCs the data whose SINR reaches the predetermined demodulation threshold; reconstructs the CRC decoding When the data stream is correct, firstly, the CRC correct data stream is coded and modulated; then, the modulated data symbols are spread, and the spreading sequence used is the same as that of the transmitting end; finally, the re-spreading data symbols Through the channel again, the channel coefficient is obtained by using a better j...

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Abstract

Embodiments of the invention provide a blind test method and device, an uplink access method and device, a receiver, a transmitter and a base station. The blind test method comprises a step of serially demodulating and decoding data of each user from a receiving symbol, wherein a process of serially demodulating and decoding the data of each user comprises the following steps of utilizing K L-length sequences generated according to a preset condition and Q compound symbol sequences to carry out correlation operation in order to generate Q*K symbol sequences, wherein each of the Q compound symbol sequences includes a symbol sequence of one or more users; selecting a plurality of symbol sequences which reach a preset demodulation threshold from the Q compound symbol sequences to demodulate and decode; reconstructing a bit sequence of the user, which is generated by correct decoding, and subtracting the reconstructed symbol sequence from the compound symbol sequences to obtain the updated compound symbol sequences; and taking the updated compound symbol data as user data of the next round of demodulation and decoding, wherein Q, K and L are all positive integers.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for blind detection and uplink access, a receiver, a transmitter, and a base station. Background technique [0002] Massive machine communication is one of the main scenarios of 5G Internet of Everything, and it is also an important technology to improve living standards. Power consumption terminal, high coverage. [0003] Traditional communication scenarios mainly serve users, and its characteristics are: 1. After the current data is transmitted, there is a high probability that there will be data transmission requirements in the future; 2. Transmission of large blocks of data, such as multimedia services; 3. Interactivity Strong, often requires the simultaneous existence of up and down. [0004] Different from traditional communication, the massive machine communication scene mainly revolves around "machines", and has characteristics that are obviously d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03H04L1/00H04B1/7107H04B1/7103
CPCH04B1/7103H04B1/71072H04L1/0048H04L25/0238H04L25/03305
Inventor 袁志锋李超李卫敏严春林
Owner ZTE CORP
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