Delay-induced scattering with phase randomization and partitioned frequency hopping

摘要

A method includes generating multiple copies of a signal that comprises a plurality of time division multiple access frames. The multiple copies of the signal includes a first copy and one or more other copies of the signal. Each of the one or more other copies of the signal having a respective fixed delay and a respective phase relative to the first copy of the signal. The method also includes transmitting the multiple copies of the signal using hopping carrier frequencies. The hopping carrier frequencies associated with a consecutive pair of the plurality of time division multiple access frames are separated by an odd multiple of a separation value representing a frequency separation between two adjacent carrier signals. The respective fixed delay is proportional to the separation value for each of the one or more other copies of the signal.

主权项

1. A method comprising:
partitioning, at a first device, a set of hopping carrier frequencies into disjoint sets such that a frequency correlation between a first hopping carrier frequency of a first set and a second hopping carrier frequency of a second set is approximately zero, wherein the first set includes odd frequencies of the set of hopping carrier frequencies, but excludes even frequencies of the set of hopping carrier frequencies, and wherein the second set includes the even frequencies of the set of hopping carrier frequencies, but excludes the odd frequencies; generating a copy of a signal, the signal comprising a plurality of time division multiple access frames, the copy of the signal having a fixed delay and a phase relative to the signal; and transmitting the signal and the copy of the signal using selected hopping carrier frequencies from the first set and the second set such that a time division multiple access frame is sent using the first hopping carrier frequency from the first set and an adjacent second time division multiple access frame is sent using the second hopping carrier frequency from the second set, wherein, transmitting the signal and the copy of the signal includes transmitting, using the first device, even frames of the plurality of time division multiple access frames using frequencies of the second set while a second device transmits even time division multiple access frames using the frequencies of the second set and odd time division multiple access frames using the frequencies of the first set.