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Apparatus and method for non-orthogonal transmission

A transmission method and non-orthogonal technology, applied in the field of non-orthogonal transmission, can solve the problem of complex demodulator, and achieve the effects of good system performance, small complexity and high spectral efficiency

Active Publication Date: 2019-06-11
HUAWEI TECH CO LTD
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Problems solved by technology

Such a demodulator is usually too complex for practical applications since it must go through all possible sequences of

Method used

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  • Apparatus and method for non-orthogonal transmission
  • Apparatus and method for non-orthogonal transmission
  • Apparatus and method for non-orthogonal transmission

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Embodiment Construction

[0048] refer to figure 1 , shows a block diagram of an exemplary transmitter apparatus 100 including aspects of the disclosed embodiments. Aspects of the disclosed embodiments are directed to increasing aggregate spectral efficiency in LDS-type multiple-access transmission schemes while reducing receiver complexity.

[0049] refer to figure 1 , in the transmitter device 100, different forward error correction (Forward Error Correction, FEC) encoders 102 are used to encode K information bit streams u. Coded bits d corresponding to different streams K are rate matched in the corresponding rate matching device 104 . The rate-matched bits e are independently interleaved in one of the interleavers 106 and then mapped in a modulator 108 to modulated symbols or modulated data messages. The modulated data message is then fed into the LDS transmitter 110 for spreading using a no cycle or cycle-free LDS spreading matrix (referred to herein as an acyclic signature matrix). like figu...

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Abstract

A transmitter device including a processor in a wireless communication system. In one embodiment, the processor is configured to receive at least one modulated data message and to spread the at least one modulated data message into the transmission signal using a low density signature matrix. The low density signature matrix is ​​an acyclic signature matrix. The receiver device is configured to receive said transmission signal and to detect at least one modulated data message within the received transmission signal. The processor is configured to detect at least one modulated data message in one iteration using the acyclic signature matrix. Such an acyclic signature matrix is ​​constructed as a concatenation of a phase-rotated identity matrix and an all-zero matrix.

Description

technical field [0001] Aspects of the present disclosure relate generally to wireless communication systems, and more particularly to non-orthogonal transmissions between base stations and wireless user equipment. Background technique [0002] One of the main challenges of next generation wireless communication systems is the considerable traffic growth. Current systems such as Long Term Evolution (LTE) already provide very high peak data rates per user in both uplink and downlink. It therefore seems plausible that such projected traffic growth is responsible for higher overall data rates, i.e., more spectral efficiency for many simultaneous users, rather than increased per-user spectral efficiency. [0003] Code division multiple access (CDMA) is one of the most spectrally efficient schemes when several users are considered. In CDMA type systems, after being assigned a user-specific signature and spread, multiple codewords related to different users are transmitted concur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/00
CPCH04J13/0007H04B1/707
Inventor 阿娜伊德·罗伯特萨法维阿尔伯托·杰赛普·佩罗蒂布兰尼斯拉夫·波波维奇
Owner HUAWEI TECH CO LTD
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