US 9,813,121 B1
Massive MIMO multi-user beamforming and single channel full duplex for wireless networks
Ping Liang, Newport Coast, CA (US)
Assigned to RF DSP Inc., Irvine, CA (US)
Filed by Ping Liang, Newport Coast, CA (US)
Filed on Apr. 22, 2017, as Appl. No. 15/494,496.
Application 15/494,496 is a division of application No. 15/036,436, previously published as PCT/US2014/065853, filed on Nov. 16, 2014.
Claims priority of provisional application 61/905,260, filed on Nov. 17, 2013.
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/022 (2017.01); H04W 16/32 (2009.01); H04B 7/06 (2006.01); H04L 5/14 (2006.01); H04B 1/10 (2006.01); H04W 72/04 (2009.01); H04B 7/0456 (2017.01); H04W 88/08 (2009.01)
CPC H04B 7/022 (2013.01) [H04B 1/1018 (2013.01); H04B 7/0456 (2013.01); H04B 7/0617 (2013.01); H04L 5/14 (2013.01); H04W 16/32 (2013.01); H04W 72/042 (2013.01); H04W 72/0413 (2013.01); H04W 88/08 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for wireless networking comprising one or more base stations (BSs) with Nbs antennas; two or more small cells (SCs) in the range of each of said one or more base stations, wherein each of said two or more small cells has Nsc antennas, and uses Nsc1≤Nsc antennas for communication with said BS in the range and uses Nsc2≤Nsc antennas for communication with one or more user equipment (UEs); which comprises:
at the same time a BS selected from said one or more BSs is transmitting downlink (DL) signals to K SCs selected from said two or more SCs in the range thereof using multi-user transmit beamforming (BF) in a DL frequency channel where K>1 and Nbs≧KNsc1, a SC selected from said K SCs receiving the DL signals from said BS and simultaneously transmitting DL signals to one or more UEs in its range using the same DL frequency channel in a single-channel full duplex mode and performing cancelation of an interference from the transmission of the DL signals to the one or more UEs on the receiving of the DL signals from the BS, and canceling the remaining interference after an Analog to Digital Converter in digital baseband using digital signal processing; and
at the same time said BS selected from said one or more BSs is receiving uplink (UL) signals from said K SCs using multi-user receive BF in a UL frequency channel where K>1 and Nbs≧KNsc1, said SC selected from said K SCs transmitting the UL signals to said BS simultaneously receiving UL signals from said one or more UEs in its range using the same UL frequency channel in a single-channel full duplex mode and performing cancelation of an interference from the transmission of the UL signals to the BS on the receiving of the UL signals from the one or more UEs, and canceling the remaining interference after an Analog to Digital Converter in digital baseband using digital signal processing.