Sum rate analysis of a reduced feedback OFDMA system employing joint scheduling and diversity
Abstract
We consider joint scheduling and diversity to enhance the benefits of multiuser diversity in an system. The spectrum is assumed to consist of resource blocks and the reduced feedback scheme consists of each user feeding back channel quality information () for only the best- resource blocks. Assuming largest normalized scheduling and a general value for , we develop a unified framework to analyze the sum rate of the system for both the quantized and non-quantized feedback schemes. Based on this framework, we provide closed-form expressions for the sum rate for three different multi-antenna transmitter schemes; Transmit antenna selection (), orthogonal space time block codes () and cyclic delay diversity (). Furthermore, we approximate the sum rate expression and determine the feedback ratio () required to achieve a sum rate comparable to the sum rate obtained by a full feedback scheme.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.