US 9,813,120 B2
Base station, and method and device for returning signal
Jian Ou, Shenzhen (CN); Yungang Li, Ottawa (CA); Ganghua Yang, Boulogne Billancourt (FR); and Yi Wang, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on May 21, 2015, as Appl. No. 14/719,028.
Application 14/719,028 is a continuation of application No. PCT/CN2013/076214, filed on May 24, 2013.
Claims priority of application No. 2012 1 0475372 (CN), filed on Nov. 21, 2012.
Prior Publication US 2015/0256233 A1, Sep. 10, 2015
Int. Cl. H04W 72/00 (2009.01); H04B 7/022 (2017.01); H04W 72/04 (2009.01); H04B 7/15 (2006.01); H04W 88/08 (2009.01)
CPC H04B 7/022 (2013.01) [H04B 7/15 (2013.01); H04W 72/0453 (2013.01); H04W 88/085 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A distributed base station, comprising: a radio frequency system comprising a radio frequency processing unit and a first return unit; and a baseband processing system comprising a baseband processing unit and a second return unit, wherein the radio frequency processing unit is configured to generate an uplink analog signal of a first bandwidth, wherein the first return unit is configured to: perform analog modulation on the uplink analog signal of the first bandwidth generated by the radio frequency processing unit; obtain an uplink analog signal of a second bandwidth; and send the uplink analog signal of the second bandwidth to the second return unit, wherein the second bandwidth is larger than the first bandwidth, wherein the second return unit is configured to: receive the uplink analog signal of the second bandwidth sent by the first return unit; and demodulate the uplink analog signal of the second bandwidth to obtain the uplink analog signal of the first bandwidth, and wherein the baseband processing unit is configured to: perform baseband processing on the uplink analog signal of the first bandwidth; and send the baseband-processed uplink analog signal of the first bandwidth to a core network;
wherein the first return unit comprises a microwave voltage controlled oscillator, and wherein the first return unit is further configured to: perform analog modulation on the uplink analog signal of the first bandwidth to obtain the uplink analog signal of the second bandwidth; convert an amplitude change of the uplink analog signal of the first bandwidth into a microwave signal through the microwave voltage controlled oscillator; and send the uplink analog signal of the second bandwidth to the second return unit through the microwave signal.