Aselsan Elektronik Sanayi Ve Ticaret Anonim Sirketi

Alptekin Yilmaz

Onur Dizdar

Cagri Goken

Onur D{dot Over (i)}zdar

Çağri Göken

A method for improving performance of an uplink non-orthogonal multiple access system under imperfect received user power control. The method is based on a plurality of user-specific transmitter filters assigned to a plurality of users. At a transmitter of each user, a signal to be transmitted according to the uplink non-orthogonal multiple access (NOMA) method is filtered by a unique filter assigned to a corresponding user, and then a baseband-to-RF processing is performed onto a symbol sequence to generate a transmitted signal. Each user transmits their respective signal using a same time-frequency resource, and receiver receives a superimposed signal which is transmitted through a plurality of respective uplink channels under imperfect received power control. An RF-to-baseband conversion is applied onto a received superimposed signal. Then, a receiver signal detection module; including an interference-cancellation multi-user detector detects each user data using knowledge of a plurality of transmitter filters of each user.

Method for improving the performance of an uplink non-orthogonal multiple access method

An uplink multiple access method based on the user-specific frozen bit patterns of polar codes assigned to users and relevant transmitter-receiver embodiments. The method includes encoding the information bits with a polar encoder by using the binary-valued, user-specific frozen bit patterns in frozen bit locations during encoding operation. The method further includes mapping of coded bits with symbols to be transmitted and baseband-to-RF processing performed on the symbol sequence. The generated signals of each user are transmitted by using the same time-frequency resources. The method further includes to receive the superposed signal of multiple users transmitted by means of relevant uplink radio channels. The method further includes an RF-to-baseband conversion on the received signal and detecting and decoding each user data by using an interference cancellation multiuser detector and a polar decoder that uses binary-valued pattern sequences assigned to the users in the frozen bit locations.

Growing community of inventors

Ankara, Turkey

Alptekin Yilmaz