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1. (AU2018264123) A MULTIUSER COMMUNICATIONS SYSTEM

Office : Australia
Application Number: 2018264123 Application Date: 16.11.2018
Publication Number: 2018264123 Publication Date: 29.11.2018
Publication Kind : A1
IPC:
H04B 1/10
H04B 1/7097
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
1
Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
06
Receivers
10
Means associated with receiver for limiting or suppressing noise or interference
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
1
Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
69
Spread spectrum techniques
707
using direct sequence modulation
7097
Interference-related aspects
CPC:
H04B 1/7107
H04B 7/18539
H04W 72/0446
H04W 72/082
H04W 88/02
Applicants: Myriota Pty Ltd
Inventors:
Agents: Madderns Pty Ltd
Priority Data: 2013903163 21.08.2013 AU
Title: (EN) A MULTIUSER COMMUNICATIONS SYSTEM
Abstract: front page image
(EN) A multiuser communication system comprises multiple transmitters and a multiuser receiver that detects multiple transmissions via iterative soft interference cancellation. An initial acquisition module and single user decoder module are also described. The multiuser receiver acquires and subtracts known users in the residual signal before acquiring new users in the residual signal, which is performed iteratively until no new users are detected or a stopping criterion is met. To aid receiver acquisition, the transmitters insert discrete tones into the transmitted signals. These allow the multiuser receiver to obtain initial estimates of the frequency, time, gain, and/or phase offset for each user. To improve the quality of cancellation the receiver refines estimates of gain, time, frequency and phase offsets for each user after each iteration, and calculates time varying SINR estimates for each user. The multiuser receiver may be satellite based, may be a distributed receiver, or process users in parallel. P i 2 s Preio Figure 3
Also published as:
CA2920292EP3036837US20160204852JP2016533681AU2014308548WO/2015/024056