This is the time at which the signal arrives at the antenna of Device B. ToDB Time of Departure from Device B. This is the time at Device B transmits over the air. ToAA Time of Arrival at Device A. This is the time at which the signal from Device B is received at Device A’...
To efficiently exploit all antenna resources, a technique that combines the advantage of beamforming and spatial multiplexing has been proposed, which partitions the transmit antennas into neigh-boring sub-groups. In this article, this technique is further improved by Eq. (1) allowing non-contiguous...
For the richly scattered Rayleigh-fading channel, we give a simple characterization of the optimal tradeoff curve and use it to evaluate the performance of existing multiple antenna schemes.关键词: diversity reception multiplexing Rayleigh channels optimisation MIMO systems encoding antenna arrays multiple-...
A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a c... AR Calderbank,AF Naguib,N Seshadri,... - US 被...
Two subcarriers at the frequencies of 5.2 and 4.9 GHz are emitted from the feeding horn antenna 1 and horn antenna 2, respectively, for exciting the metasurface simultaneously. The light signal with two modulation information (videos 1 and 2) are converted directly to BFSK signals 1 and 2,...
filtering process. With different optical multiplexing techniques, optical devices allow outstanding multichanneling filtering with the help of microwave photonic filtering [84]. These optical devices are well consistent and have high bandwidth. In the process of microwave photonic filtering, the signals ...
Visible Light Communications (VLC) can provide both illumination and communications and offers a means to alleviate the predicted spectrum crunch for radio-frequency wireless communications. In this paper, we report a laser diode based white-light commun
The transmission performance of orthogonal frequency-division multiplexing (OFDM) in time-varying channels can be adversely affected by intercarrier interf... Wang,Lin,Sang - IEEE 被引量: 4发表: 2012年 ANTENNA SWITCHING CONTROL FOR A0A ACQUISITION IN TELEPHONE AS KEY SYSTEMS WITH DE-WHITENED SOUN...
Communications networks, such as LTE, may have frequency division multiplexing (FDM) implementations and time division multiplexing (TDM) implementations. Sharing options in FDM implementations are not truly sharing different antennas, but rather sharing the frequency spectrum received over the antenna. For...
A global antenna diversity system including analog front-end and digital processing has been implemented in order to perform simulation validation. Results show that the bit error rate does not increase significantly with the multiplexing and this increase is compensated for a high IQ imbalance. 展开...