SYSTEM AND METHOD FOR DATA COMMUNICATION

摘要

PURPOSE: To protect a system from fading by combining a technique which uses coding modulation having a built-in diversity and soft discrimination coding together to detect a strong interference. CONSTITUTION: In a transmission equipment, data from a binary data source 11 is supplied to a 2N-dimension block encoder/mapping device 13 in a proportion of m bits per signal interval of T seconds. The device 13 accumulates blocks of input data consisting of N bits corresponding to signal intervals and uses a special 2N-dimension block code to encode N×m accumulated bits into N groups each of which consists of m+r encoded bits. These groups are continuously supplied to a lead 15. The parameter (r) is the number of redundant bits per signal interval which is introduced by the device 13. Each allowed bit pattern in the (m+r)-bit group is bound to a two-dimensional (2D)M(<=2 )-PSK configuration. A block code is 2N-dimension.