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For the mobile radio channel parameter estimation, the Space-Alternating Generalized Expectation-maximization (SAGE) algorithm is a popular scheme to estimate the individual path parameters, i.e., the relative delay, incidence azimuth, Doppler frequency, and complex amplitude of impinging waves. Because of the constraint of bandwidth of channel sounding signal and the limitation of the number of antennas,...
In this paper, we propose a zero-padded (ZP) packet transmission scheme for forward link packet data channel (F-PDCH) of cdma2000 1x EV-DV. The system utilizes the quasi complementary Turbo codes (QCTC) to adjust its packet format to be modulated in ZP single-carrier frequency domain equalizer (FDE) symbol units while the subpacket structure of forward link packet data channel is preserved. Thus,...
This paper studies six half-duplex cooperative relaying schemes with one multi-hop beamforming scenario in the 60 GHz band. Five of them are known. One new scheme is modified based on superposition coding. Under this scenario, we make the achievable rate expressions of the studied relaying schemes. By using these expressions, the comparison is made in terms of achievable rate versus relay-node position...
In this paper, we propose an improved blind channel estimation scheme for single-input single-output (SISO) orthogonal frequency-division multiplexing (OFDM) systems. In the proposed scheme, a modified cross-correlation matrix is obtained by dividing, element-wise, the cross-correlation matrix by the preceding matrix and then the channel vector is estimated by applying the principal eigenvector method...
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