Patent ID: 8000377
Filing Date: 2011-08-16
Classification: H04B,H04J

Abstract:
1. A communications system utilizing code division multiple access (CDMA), time division multiple access (TDMA) and code division multiplexing (CDM) techniques for efficiently transmitting bursts of data from a plurality of users at different data rates to one or more receivers within the system, comprising: a timing reference for generating a precise timing signal and a corresponding precise time reference; a plurality of transmitters, coupled to the timing reference for providing synchronization between the plurality of transmitters, for transmitting the bursts of data at precise times and time intervals and at a predetermined frequency within a TDMA superframe wherein synchronization between said plurality of transmitters and the one or more receivers is not needed; and wherein, each of the transmitted bursts of data includes message data interleaved using an interleaving multiplexer into a plurality of transmit bit sets to increase message size in each of the bursts of data, where the plurality of transmit bit sets are incorporated into a plurality of transmit codes that are generated using at least one additional spreading code that is orthogonal to a base spreading code, combined and spread using a scrambling sequence and modulated with a carrier thereby facilitating simultaneous transmission of the plurality of transmit bit sets for each burst of data within a corresponding time slot within the TDMA superframe, and wherein the TDMA superframe includes a plurality of TDMA frames, each TDMA frame including a plurality of time slots for transmitting the bursts of data.