JOINT PRECODING AND MULTIVARIATE BACKHAUL COMPRESSION FOR THE DOWNLINK OF CLOUD RADIO ACCESS NETWORKS

摘要

Signals transmitted on the backhaul links of a cloud radio access network may be compressed using joint compression encoding. Joint compression encoding may be performed using a successive estimation-compression architecture. Joint compression encoding may include designing preceding matrices that may be used with signal compression. Joint compression encoding may be applied to signals transmitted on the downlink of the cloud radio access network. One or more baseband signals to be delivered over the backhaul links may be jointly compressed using multivariate compression. Multivariate compression may be implemented using successive compression based on a sequence of minimum mean squared error (MMSE) estimations and per BS compression.

主权项

1. A method of compression encoding, the method comprising:
precoding a first signal into a first precoded signal; precoding a second signal into a second precoded signal; quantizing the first precoded signal into a first quantized signal; generating a minimum mean squared error (MMSE) estimate based on the first quantized signal and the second precoded signal; quantizing the second precoded signal into a second quantized signal, wherein quantizing the second precoded signal includes applying the MMSE estimate to the second precoded signal; and transmitting the first and second quantized signals.