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A generalized multiuser cooperative concatenated coding framework is theoretically developed for not only cooperative diversity but also enhanced distance spectra. Novel schemes are proposed featuring flexible cooperation group, variable-size messages, and other practical concerns. In particular, users failing to detect their partners messages are allowed to cooperate without incurring error propagation.
Multiple frequency offsets (CFO) in cooperative communications are difficult, if not impossible, to compensate completely at the destination node. The multiple CFO make the channel time-varying, and thus the conventional space-time codes to collect diversity gain for co-located multi-input multi-output (MIMO) systems may not be applied directly. In a previous paper, we proposed a distributed space-frequency...
The diversity advantage of MIMO systems has recently been exploited in collaborative schemes. This allows the nodes without access to multiple transmitting antenna elements to transmit information more efficiently. In a previous work, the authors proposed the collaborative scheme using a variable time fraction. In this paper, this scheme is further studied and an upper bound on the performance of...
Li and Xia have recently investigated the design of space-time codes that achieve full spatial diversity for asynchronous cooperative communications. They show that certain of the binary space-time trellis codes derived from the Hammons-El Gamal stacking construction are delay tolerant and can be used in the multilevel code constructions by Lu and Kumar to produce delay tolerant space-time codes for...
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