Transmit diversity techniques provide attractive solutions for increasing downlink capacity in 3G systems within low-mobility environments. Open-loop and closed-loop transmit diversity modes with two transmit antennas have already been included into 3GPP WCDMA Release 4, and at the moment schemes exploiting a larger number of transmit antennas are being developed. This paper analyzes the perfor...

We introduce a new family of Space-Time Trellis Codes which extends the powerful characteristics of SuperOrthogonal Space-Time Trellis Codes to four transmit antennas. We consider a family of quasi-orthogonal space-time block codes as building blocks in our new trellis codes. These codes combine set-partitioning and a super set of quasi-orthogonal space-time block codes in a systematic way to p...

We propose a new bandwidth and power efficient signaling scheme for achieving high data rates over wideband radio channels exploiting bandwidth efficient OFDM modulation, multiple transmit and receive antennas and large frequency selectivity offered in typical low mobility indoor environments. Due to its maximum achievable transmit diversity gain and large coding gain, space-frequency turbo cod...

We propose a novel resource allocation scheme, which can reduce MAP overhead and maximize the throughput in the MIMO-OFDM systems. In the message based broadband access system, we need to minimize the MAP overhead since the excessive MAP overhead causes degradation of system throughput. Increasing the size of resource allocation unit can reduce MAP overhead. However, multiuser diversity gain be...

A beamforming system combined with fourbranch space-time block encoder is proposed. This leads to higher system performance and system flexibility in that the number of transmit antennas is not limited unlike transmit diversity system. Our system shows mainly three interesting results. First, diversity gain from space-time block coding (STBC) and beamforming gain are observed. Second the effect...

The diversity gain of the joint error probability (JEP) of the decorrelating decision feedback detector (D-DFD) for multiple-input multiple-output (MIMO) systems in the presence of Rician fading is considered. Upper bounds on the JEP are derived for both M-ary Phase-Shift-Keying (PSK) and M-ary Quadrature Amplitude Modulation (QAM). It is shown that the diversity gain of the D-DFD receiver in b...

In this paper, we present simulation results for the performance gain of smart dual antennas at handsets for the forward link in the cdma2000 system. The system was modeled with the SPW of Cadence. Three types of the channel model, two levels of diversity combining, and three diversity combining schemes were investigated. Our simulation results show that the average performance gain (reduction ...

We present a novel analysis of the state of the art in object tracking with respect to diversity found in its main component, an ensemble classi er that is updated in an online manner. We employ established measures for diversity and performance from the rich literature on ensemble classi cation and online learning, and present a detailed evaluation of diversity and performance on benchmark seq...

Multiple antenna (MIMO) devices are widely used to increase reliability and information bit rate. Optimal error rate performance (full diversity and large coding gain), for unknown channel state information at the transmitter and for maximal rate, can be achieved by approximately universal spacetime codes, but comes at a price of large detection complexity, infeasible for most practical systems...

We study diversity in one-shot communication over molecular timing channels. We consider a channel model where the transmitter simultaneously releases a large number of information particles, while the information is encoded in the time of release. The receiver decodes the information based on the random time of arrival of the information particles. The random propagation is characterized by th...