We construct a class of linear quasi-orthogonal space-time block codes that achieve full diversity over quasi-static fading channels for any transmit antennas. These codes achieve a normalized rate of 1 symbol per channel use. Constellation rotation is shown to be necessary for the full diversity feature of these codes. When the number of transmit antennas is a power of two, these codes are als...

We construct a class of linear quasi-orthogonal space-time block codes that achieve full diversity over quasistatic fading channels for any transmit antennas. These codes achieve a normalized rate of one symbol per channel use. Constellation rotation is shown to be necessary for the full-diversity feature of these codes. When the number of transmit antennas is a power of 2, these codes are also...

Sufficient conditions to ensure QAM space-time codes achieve full space diversity in quasistatic fading channel are presented. T h e conditions are o n code words or generator matrices instead of on every code word pair. This greatly simplifies the construction of full space diversity codes.

Multiple-input multiple-output (MIMO) wireless systems are of interest due to their ability to provide substantial gains in capacity and quality. This paper proposes equal gain transmission (EGT) to provide diversity advantage in MIMO systems experiencing Rayleigh fading. The applications of EGT with selection diversity combining, equal gain combining, and maximum ratio combining are addressed....

In this paper, we investigate the diversity, capacity and complexity issues of cooperative Zero-Padding (ZP)-Orthogonal Frequency Division Multiplexing (OFDM) communication. We consider cooperative ZP-OFDM communication over a multipath Rayleigh channel and with multiple Carrier Frequency Offsets (CFOs) existing at different relays. We use a cooperative tall Toeplitz scheme to achieve full coop...

Space-frequency (SF) coded orthogonal frequency division multiplexing (OFDM) systems have been recently proposed for cooperative communications to achieve both full cooperative and full multipath diversities without the time synchronization requirement. In this paper, we show that the full diversity property still holds for a family of SF codes (rotation-based SF codes) when there are multiple ...

This paper proposes a low decoding complexity, full-diversity and full-rate space-time block code (STBC) for 4 transmit and 2 receive (4 × 2) multiple-input multiple-output (MIMO) systems. For such systems, the best code known is the DjABBA code and recently, Biglieri, Hong and Viterbo have proposed another STBC (BHV code) which has lower decoding complexity than DjABBA but does not have full-d...

Transmit diversity is necessary in harsh environments to reduce the required transmit power for achieving a given error performance at a certain transmission rate. In networks, cooperative communication is a well-known technique to yield transmit diversity and network coding can increase the spectral efficiency. These two techniques can be combined to achieve a double diversity order for a maxi...

The paper carries out performance analysis of a multiuser full-duplex (FD) communication system. Multiple FD UEs share the same spectrum resources, simultaneously, at both the uplink and downlink. This results in co-channel interference (CCI) at the downlink of a UE from uplink signals of other UEs. This work proposes the use of diversity gain at the receiver to mitigate the effects of the CCI....

We propose a new class of space-time trellis codes for 4 transmit antennas. These codes combine set-partitioning and a super set of quasi-orthogonal space-time block codes in a systematic way to provide full diversity and improved coding gain. The result is a very powerful non full-rate code that provides full diversity and high coding gain for different number of states and at different rates....