Methods and apparatus of enhanced coding in multi-user communications systems

Abstract

First and second sets of information are transmitted using a relatively large transmission block including a plurality of minimum transmission units (MTUs), each MTU corresponds to a unique combination of resources. A first set of said MTUs is used in conveying said first set of information, said first set including at least a majority of said MTUs in the transmission block. A second set of said MTUs is defined, e.g., selected, for use in conveying said second set of information, said second set of MTUs including less MTUs than first set and at least some MTUs included in the first set. The first and second sets of information are communicated by transmitting at least some MTUs included in said first and second sets of MTUs with the corresponding information modulated thereon. The communicating of the information may be through superposition of the first and second information on shared MTUs.

Description

technical field [0001] The present invention is directed to improved methods of encoding and transmitting information in wireless communication systems. Background technique [0002] Superposition coding in a multi-user communication system will now be discussed. A multi-user communication system includes several transmitters and receivers communicating with each other and may use one or more communication methods. In general, multi-user communication methods can be classified into one of two cases: [0003] (a) a single transmitter communicates with several receivers, which is commonly referred to as a broadcast communication method, and [0004] (b) Several transmitters communicate with one common receiver, which is generally called a multi-access communication method. [0005] Broadcast communication methods are often referred to as "broadcast channels" in communication and information theory literature, and will be referred to as such in the remainder of this document...

AI Technical Summary

Problems solved by technology

[0022] In view of the foregoing discussion, it is apparent that there is a need for novel methods and apparatus that allow communication systems to operate using controlled superposition coding broadcast and / or multiple access communication methods to take advantage of the higher speeds achievable in the channel , while overcoming the practical difficulties of imperfectly canceling high-power signals and the complexity and cost associated with the joint decoder approach

Images