Abstract: A variable bandwidth receiver uses allocated bandwidth more efficiently and ensures that blocking signals do not overload receiver components. The receiver includes multiple branches for receiving a first bandwidth signal. Each receiver branch has a filter for passing signals in a frequency band corresponding to a second bandwidth less that the first bandwidth and an analog-to-digital converter for converting the baseband signal into a digital signal. A controller digitally combines the digital signals from two or more of the receiver branches to produce a received signal having a bandwidth substantially wider than the first bandwidth. Because combining is done after analog-to-digital conversion in the digital domain, the controller can combine the digital signals from two or more of the receiver branches having adjacent corresponding frequency bands without the normal guard band separating them.

Abstract: Data is transmitted during a transmission time interval using an available frequency bandwidth. Blocks of data to be transmitted at different power levels are identified. Multiple portions of the data blocks are distributed for transmission at different frequencies so that data blocks with higher power levels are distributed more toward the center of the determined frequency bandwidth than data blocks with lower power levels. The distributing of data block portions reduces the power of intermodulation products occurring outside the determined frequency bandwidth caused by radio frequency signals carrying the distributed data block portions fed through a non-linear power amplifier. It also reduces peaks in the power of the intermodulation products.