IMPROVED CAPACITY FOR NARROW-BAND HYBRID MODULATION

摘要

Techniques and apparatus are disclosed for multiplexing multiple Narrowband Hybrid Modulation sub-channels in the same radio channel. This is accomplished by applying symbol phase rotation and/or phase rotation of the modulated I/Q samples to at least one of two or more simultaneously transmitted Narrowband Hybrid Modulation bursts in the same GSM/GPRS radio frequency channel, in the same cell. Other embodiments of the techniques disclosed herein exploit this symbol/sample rotation approach to create orthogonal channels of Narrowband Hybrid Modulation bursts, on the same radio frequency channel. These orthogonal channels can be transmitted in different cells, to allow the use of the same GSM/GPRS radio frequency channel in multiple adjacent cells while at the same time minimizing inter-cell interference.