EQUIPMENT AND METHOD FOR GENERATING AND DISTRIBUTING CODING SYMBOL IN CODE DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEMPROBLEM TO BE SOLVED: To provide equipment and a method for generating and distributing a
The generator of the invention realizes optical Fourier inverse transformation in a fully optical way so as to obtain the OFDM symbol, solves the bottleneck problem on electron of the traditional OFDM system and improves transmission speed of an optical communication system.李蔚...
Over-the-airdigital televisionbroadcasting uses an 8-VSB format, while cable generally uses 64- or 256-QAM modulation for both data packets anddigitized video. Because each transmitted symbol represents more than one bit of information, high-order modulation schemes have greater bandwidth efficiency....
# in these scripts will be unencrypted PublishScripts/ # NuGet Packages *.nupkg # NuGet Symbol Packages *.snupkg # The packages folder can be ignored because of Package Restore **/[Pp]ackages/* # except build/, which is used as an MSBuild target. !**/[Pp]ackages/build/ # Uncomment...
(IFFT) is used to multiplex theQAM symbolsonto frequency subcarriers in a time-sequence OFDM symbol. Cyclic prefixes (CPs) are inserted between OFDM symbols to mitigate against ISI. Each OFDM symbol with CP is then written onto a serial stream by a parallel-to-serial converter. This serial ...
39. If mode coupling is weak then a data symbol carried by multiple modes with different group indices will spread linearly in time with fibre length. In contrast, if the coupling is strong, then the temporal spread will follow a random-walk process and will scale as the square root of ...
In multipath propagation, a single signal is received via multiple paths, with a relative delay between them. The late arrival of the scattered portions of the signal causesghost images. For an integration period (symboln), if the relative delay is more than one symbol period, the signal from...
For H-FDD operation, a guard period is virtually created by the UE by not receiving the last OFDM symbol(s) of a downlink subframe immediately preceding an uplink subframe in which the UE is active. The length of the guard period is the sum of the maximum round-trip propagation delay ...
This low-pass effect is due to the long integration time of the OFDM symbol duration. This phase error can, in principle, be corrected by using pilots within the same symbol (in-band pilots). The phase error causes sub-carrier constellation blurring rather than rotation. It results from the...
Accordingly, a method and apparatus are provided wherein a receiver system selects a pre-coding matrix, comprising eigen-beamforming weights, to use and provides rank value and matrix index associated