Orthogonal Frequency Division Multiplexing (OFDM) technique has received a great attention and has been widely used in the wireless communication systems for its high spectrum efficiency and robustness to the narrowband interference and multipath fading. The technique is to divide the channel into many orthogonal subchannels in the frequency domain, and convert the high speed signals to paralle...

Saccadic eye movements transiently distort perceptual space. Visual objects flashed shortly before or during a saccade are mislocalized along the saccade direction, resembling a compression of space around the saccade target. These mislocalizations reflect transient errors of processes that construct spatial stability across eye movements. They may arise from errors of reference signals associa...

Sampling rate conversion in multirate filter banks leads to time-varying phenomena, which differ between deterministic and stationary random signals. More specifically, downsampling causes deterministic signals to become periodically shift variant, while upsampling turns stationary random signals into cyclostationary signals. We provide criteria for the quantification of these effects, and comp...

Abstract– The idea of co-located Multiple-Input Multiple-Output (MIMO) radars is based on transmission of orthogonal signals. In conventional co-located MIMO radars, usually a set of orthogonal code modulated pulses is transmitted. In this approach, finding orthogonal signals with a proper range side-lobe level is a problem. In this paper the approach of transmitting a set of proper pulse-train...

Advanced Evolved Universal Terrestrial Radio Access (Advanced E-UTRA), called LTE-Advanced, has been standardized in the 3rd Generation Partnership Project (3GPP) as a candidate for IMTAdvanced. LTE-Advanced supports spatial orthogonal-resource transmit diversity (SORTD) [1], [2] for ACK/NACK signals and scheduling requests (SRs), which are used to control downlink hybrid automatic repeat reque...

This paper considers the design of signature waveforms that optimize the total capacity of multiuser decoders for the QAM-synchronous Gaussian multiple-access channel under a Fractional Out-of-Band Power (FOBP) bandwidth constraint. In doing so, it imposes a hitherto unrecognized constraint that is relevant in wireless communication networks: the bandwidth must be independent of the location at...

in this paper, we propose space-time block codes based on constituent intersectant orthogonal designs. after channel model is formulated, we studied the space-time block codes from constituent intersectant orthogonal designs. at last we made simulations for the space-time block codes from complex orthogonal design and the space-time block codes from constituent intersectant orthogonal design to...

In a series of psychophysical experiments, observers compared the apparent contrast of a dichoptic stimulus (contrast edges of orthogonal orientations in the two eyes) and a monocular stimulus ( a pie pattern in one eye and a blank field in the other eye). When the contrast of the dichoptic stimulus was low (2-3%) the two orthogonal edges were perceived as a stable pie pattern and its apparent ...

This paper proposes several algorithms to recover the transmitted signals in systems with multiple antennas that make use of orthogonal space time block code (O-STBC) to attain full transmit diversity. We interpret the scheme proposed by Alamouti in [1] and half-rate systems presented in [2] as classic blind source separation (BSS) problems where the received signals (observations) are instanta...

For the special case of orthogonal signals the error probability can be expressed as a single integral. Because of the difficulty of evaluating the error probability for general signal sets, bounds are needed to determine the performance. Different bounds have different complexity of evaluation. This first bound we derive is known as the Gallager bound. We apply this bound to the case of orthog...