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In order to calibrate the consistency of the amplitude and phase of four-channel digital variable polarization monopulse radar receiving system, a calibration method based on exterior space calibration is proposed. Making use of this method, author completes the calibration in the darkroom. After calibration, the experimental results show that in receiving pattern the polarization purity, null depth...
This paper proposes a transmit power allocation scheme for distributed transmit antenna Alamouti space-time block coded (STBC) orthogonal frequency division multiplexing (OFDM) systems using Cholesky decision-feedback detection in the presence of multiple residual frequency offsets (RFOs). Multipath Rayleigh fading is considered, and separate power constraint on each transmit antenna is assumed. The...
This correspondence focuses on the correction of carrier frequency offsets (CFOs) in orthogonal frequency-division multiplexing (OFDM)-based spatial multiplexing multi-input-multi-output (MIMO) with distributed transmit antennas, where the CFOs between the receiver and each transmit antenna are possibly different. Considering macroscopic fading and multipath Rayleigh fading, the average power of the...
This paper focuses on the compensation of carrier frequency offsets (CFO) in multi-input multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems with distributed transmit antennas, where the CFOs are possibly different for each transmit antenna. Considering macroscopic fading and multipath Rayleigh fading, the average power of the intercarrier interference (ICI) caused by the...
A modified Vertical-Bell Labs layered space-time (V-BLAST) system has been proposed in [1], where different delay offsets are intentionally applied to the spatially multiplexed data streams. Compared with the conventional synchronous V-BLAST system, the modified system can achieve Mr thorder diversity using zero-forcing(ZF) detection (where Mr is the number of receive antennas), therefore giving a...
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