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This letter provides a comprehensive overview and extension of recent results on outage probabilities and bit-error rates (BER) for optimal combiners in the presence of multiple interferers and additive noise. Desired signal and interferers are subject to flat Rayleigh fading and all channels are independent. In addition to summarizing previous work, this letter also derives the BER for a wider range...
This paper investigates an iterative algorithm to control weighting coefficients of transmit/receive spatial filters in a frequency-division duplex (FDD) based eigen-mode space division multiplexing (E-SDM/FDD) system. In this system, weighting matrices of transmit/receive spatial filters are optimized using an iterative algorithm that minimizes the mean square error (MSE) of the virtual received...
Mobile WiMAX is a broadband wireless access based on OFDM/OFDMA technology which employs Adaptive Modulation and Coding (AMC) scheme to attain higher data rates. In this paper, a selection strategy is incorporated with GNU Radio for the determination of Modulation and Coding Scheme (MCS) level dependent upon channel estimation parameter over AWGN and Rayleigh fading channels. MCS level choice has...
An OFDM based WiMAX physical layer combining with Continuously Variable Slope Delta (CVSD) speech coding strategy has been implemented utilizing GNU Radio and USRP N210. CVSD vocoder is a non linear sampled data feedback framework which recognizes a band limited analog signal and converts it into binary form for transmission through a digital channel. The binary signal is decoded into a nearby estimate...
MATLAB is a very useful tool when it comes to simulating the bit error rate (BER) of a WiMAX 802.16e system. However, despite its flexibility, the time taken for a simulation to be completed is rather significant. This is due to the time cumulated to simulate a sufficient number of frames to get an accurate result. Multiple simulations with varying parameters such as signal-to-noise ratio (SNR) are...
An optical interface for use between teleprotection and digital multiplexer equipment Keywords that can operate at a data rate of N 64 kbps where N = 1, 2 12 is described in this standard. Requirements for both physical connection and the communications timing are also included.
noticeable degradation was observed in the eye patterns when the bit rate is 82.5 Gbit/s and 165 Gbit/s. Keywords-component; optical DPSK receiver, delay interferometer, stabilization
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