نتایج جستجو برای: mono bit receiver
تعداد نتایج: 123602 فیلتر نتایج به سال:
In this paper, the performance of a wide field view VLC receiver that includes silicon photomultiplier (SiPM) is reported. particular, ±45° and On-Off keying data rates 1.8 Gbps are demonstrated in 500 lux ambient light. These results achieved by combining optical absorption filters with 6 mm SiPM. By absorbing light between 450 nm 750 these ensure SiPM not saturated reduces transmitter power n...
We present a 12.5-Gb/s monolithically integrated optical receiver with CMOS avalanche photodetector (CMOS-APD) realized in 65-nm CMOS technology. The optical detection bandwidth limitation of CMOS-APD due to the carrier transit time is compensated by underdamped TIA. With this optical receiver, 12.5-Gb/s 850-nm optical data are successfully detected with bit-error rate less than 10 at the incid...
A decision-feedback maximum a posteriori (MAP) receiver is proposed for code-division multiple-access channels with time-selective fading. The receiver consists of a sequence-matched filter and a MAP demodulator. Output samples (more than one per symbol) from the matched filter are fed into the MAP demodulator. The MAP demodulator exploits the channel memory by delaying the decision and using a...
Study on suppression of interference in time domain equalizers is attempted for high data rate impulse radio (IR) ultra wideband communication system. The narrow band systems may cause interference with UWB devices as it is having very low transmission power and the large bandwidth. SRAKE receiver improves system performance by equalizing signals from different paths. This enables the use of SR...
In this paper the performance of the direct sequence spread spectrum (DSSS) receiver containing the adaptive two-stage decision feedback (DFB) filter in the presence of the narrowband autoregressive interference is analyzed. The receiver performance is expressed in regard to the Signal/(interference+noise) ratio and the bit error probability. The adaptive version of the proposed receiver based ...
In this paper performance analysis of IDMA systems is determined using different coding techniques. In this paper we use a receiver diversity approach which is useful in combating the fading in the IDMA scheme. In the transmitter section a single antenna is used where as in the receiver section two antennas are used. A comparative study has been performed between convolutional coding and zigzag...
This paper reports on investigations into the performance of a Multiple Input Multiple Output (MIMO) wireless communication system employing a uniform linear array (ULA) at the transmitter and either a uniform linear array (ULA) or a uniform circular array (UCA) antenna at the receiver. The transmitter is assumed to be surrounded by scattering objects while the receiver is postulated to be free...
This paper explores channel estimation using superimposed pilots for OFDM systems. The pilots are added linearly to the modulated symbol at a fraction of the total transmit power, making the method spectrally efficient. We present a series of receivers in which complexity is traded for performance; in particular, a receiver that achieves the theoretically lowest BER but has high complexity and ...
We propose a receiver using two optical hardlimiters (OHL’s) for optical code division multiple access (CDMA). In the receiver the likelihood ratio test is made by using the photocounts obtained by the intensities in the weighted positions of the signature sequence. Before the test, two OHL’s enable the proposed receiver to remove the effect of the multiaccess interference (MAI), without knowle...
In this paper, error-control coding is used with a six-port direct-digital QPSK receiver [1] in an AWGN channel. The direct-conversion wideband six-port millimeter wave receiver proposed herein meets the needs of MMIC mass-market wireless communications. Convolutional code and Turbo code are used as the channel codes for the first time in this type of receiver. The BER results for the convoluti...
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