Abstract: Cost, electronic circuitry limitations, and communication channel behavior yield communication systems with strict bandwidth constraints. Hence, maximally utilizing available bandwidth is crucial, for example in wireless networks, to supporting ever increasing numbers of users and their demands for increased data volumes, low latency, and high download speeds. Accordingly, it would be beneficial for such networks to support variable bandwidth allocations such that smaller frequency sub-bands are allocated to users, as their number increases, but the individual users/nodes insert more data-carrying signals in order to compensate for the loss of operating bandwidth arising from the accommodation of more users. It would further be beneficial for transmitters and receivers according to embodiments of such a network architecture to be based upon low cost design methodologies allowing their deployment within a wide range of applications including high volume, low cost consumer electronics for example.

Abstract: Cost, electronic circuitry limitations, and communication channel behaviour yield communication systems with strict bandwidth constraints. Hence, maximally utilizing available bandwidth is crucial, for example in wireless networks, to supporting ever increasing numbers of users and their demands for increased data volumes, low latency, and high download speeds. Accordingly, it would be beneficial for such networks to support variable bandwidth allocations such that smaller frequency sub-bands are allocated to users, as their number increases, but the individual users/nodes insert more data-carrying signals in order to compensate pensate for the loss of operating bandwidth arising from the accommodation of more users. It would further be beneficial for transmitters and receivers according to embodiments of such a network architecture to be based upon low cost design methodologies allowing their deployment within a wide range of applications including high volume, low cost consumer electronics for example.

Abstract: The present invention relates to a method and system for non-Gaussian code-division-multiple-access signal transmission and reception. Input probability data indicative of a non-equiprobable channel input probability mass function are determined based on received channel data indicative of characteristics of a CDMA transmission channel. The input probability data are determined such that a transmission signal received after transmission has a non-Gaussian distribution. Upon receipt of input user data, a CDMA signal is generated by modulating the received user input data in dependence upon the input probability data and provided for transmission. After transmission a received transmission signal is first processed for determining second channel data and then for determining an estimate indicative of the user input data based on the second channel data.