Multimode Precoding for Multiuser MIMO Systems With Finite Rate Feedback

2017 ◽  
Vol 6 (2) ◽  
pp. 142-145
Author(s):  
Kyeongjun Ko ◽  
Yonghee Han ◽  
Jungwoo Lee
Keyword(s):  
Mimo Systems ◽  
Multiuser Mimo ◽  
Finite Rate ◽  
Rate Feedback ◽  
Finite Rate Feedback ◽  
Multiuser Mimo Systems

DYNAMIC RESOURCE ALLOCATION WITH FINITE RATE FEEDBACK FOR MULTIUSER MIMO-OFDM SYSTEMS

2011 ◽  
Vol 20 (03) ◽  
pp. 501-513 ◽  
Author(s):  
LEI XU ◽  
DAZHUAN XU ◽  
XIAOFEI ZHANG ◽  
SHUFANG XU ◽  
JUNBO WANG ◽  
...  
Keyword(s):  
Resource Allocation ◽  
Base Station ◽  
System Throughput ◽  
Ofdm Systems ◽  
Multiuser Mimo ◽  
Finite Rate ◽  
Rate Feedback ◽  
Primal Dual ◽  
Mimo Ofdm ◽  
Finite Rate Feedback

Tailored for the best effort service, the present paper deals with dynamic allocation of subcarriers, rate and power resources based on channel state information (CSI) for multiuser MIMO-OFDM systems with trellis code modulation (TCM). Users rely on adaptive modulation and power modes that they select in accordance with the finite-rate feedback (FRF) they receive from the base station (BS). The BS uses CSI to maximize a generic concave utility of average rates while adhering to power constraints imposed on every user. We utilize a stochastic approximation primal-dual algorithm for on-line scheduling and resource allocation. The resultant optimum resource allocation depends on the current channel realization and optimally calculates dual prices. The simulation results show that the system throughput of proposed algorithm is not only good but also can effectively reduce the feedback overhead and the adoption of TCM can improve the system throughput greatly comparing to uncoded system.

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