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1. (WO2017177880) SYSTEMS AND METHODS FOR SPREADING AND CO-ORTHOGONAL MULTI-STREAM SPREADING

Pub. No.:    WO/2017/177880    International Application No.:    PCT/CN2017/079969
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Tue Apr 11 01:59:59 CEST 2017
IPC: H04L 27/26
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
Inventors: TAHERZADEH BOROUJENI, Mahmoud
BAYESTEH, Alireza
BALIGH, Mohammadhadi
MA, Jianglei
Title: SYSTEMS AND METHODS FOR SPREADING AND CO-ORTHOGONAL MULTI-STREAM SPREADING
Abstract:
Systems and methods are provided for spreading symbols over multiple time-frequency resources that rely on simple base constellations that can be sent over a frequency tone or time slot. A set of input bits (or an input symbol) are mapped to K symbols, and a symbol-to-resource-element mapping is applied that maps the K symbols to resource units. The mapping to the K symbols may be a linear mapping that maps an input symbol to K target tones through a 2K ×2 real matrix, where input symbol is a complex point in a base constellation, and is considered as a 2-dimensional real vector. Up to K co-orthogonal 2K × 2 real matrices (whose columns are orthogonal to each other) can be associated with the subset of K target tones. Each of the K co-orthogonal matrices can be used for mapping of an independent symbol from a separate steam of symbols which can be associated to a single UE or separate UEs.