Method and apparatus for symbol detection

Abstract

Apparatus and method for symbol detection are disclosed. The solution comprises obtaining (400) multiple-input-multiple-output symbols received over a transmission channel, the symbols comprising a plurality of layers, each layer comprising a constellation point of multiple candidate constellation points, selecting (402) for each layer a precision, each layer having a precision smaller or equal than the precision of a previous layer and searching (404) for each layer, utilising the selected precision, the constellation point among the candidate constellation points by minimising a given cost function, utilising a plurality of Arithmetic and Logic Units, ALUs, comprising at least one real and imaginary part, the ALUs of the apparatus comprising real and imaginary part having different precisions by having different number of bits, the data memory and the plurality of ALUs being connected with each other by a data bus of a given width.

Description

TECHNICAL FIELD[0001]The exemplary and non-limiting embodiments of the invention relate generally to communications.BACKGROUND[0002]Wireless telecommunication systems are under constant development. There is a constant need for higher data rates and high quality of service. Partly for these reasons the modern telecommunication systems, such as fifth generation, 5G, networks are moving towards millimeter-wave, mmW, frequencies to seek for wide spectrum access, which eventually enables extremely high data rates.[0003]To achieve high capacity and data rate Multiple-Input Multiple-Output , or MIMO, transmission has been studied. MIMO is a term that is used for a method of transmitting and receiving of more than one data signal simultaneously over the same radio channel. A base station or access point of a communication system may transmit using many antenna beams pointed in different directions instead of an omnidirectional transmission. Respectively a user terminal may utilize more tha...

AI Technical Summary

Benefits of technology

[0008]The scope of protection sought for various embodiments of the invention is set out by the independent claims.

[0009]The embodiments and or examples and features, if any, described in this specification that do not fall under the scope of the independent claims are to be interpreted as examples useful for understanding various embodiments of the invention.

Problems solved by technology

A Minimum mean square error, MMSE and Zero Forcing, ZF, MIMO detectors are relatively simple to realize but the performance is far from the optimal.

On the other hand, maximum likelihood detection has a good performance but has a very high complexity.

However, sphere detection suffers from very high computational complexity that leads to high latency.

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