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where is the nominal bandwidth of the WiMAX signal.
For high-quality video stream transmission, the peak data rate may exceed the nominal bandwidth over wireless links.
It is the OFDMA/TDD system with 768 useful subcarriers over a nominal bandwidth of 8.75 MHz at 2.3 GHz band.
As an example of this application, a WiMAX system with -QAM scheme, nominal bandwidth of 2 MHz and dBi is considered.
At 44.1 kHz sample rate this corresponds to a nominal bandwidth of 344 Hz, and a time resolution of 1.4 ms.
However, as discussed for QAM modulation, the nominal bandwidth depends on the PSD of the transmit signal and, thus, on the applied Markov source which describes the transmit symbol sequences.
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Single readout channel is built of an input AC-coupling circuit with the cut-off frequency below 0.1 Hz, a low noise preamplifier and two parallel band-pass filters with nominal bandwidths from 2 Hz to 100 Hz and from 200 Hz to 2 kHz.
The vertical dashed red lines indicate the nominal bandwidths of the antialiasing filters, and the baseband of the HSDPA signal is shown by the solid red lines.
For example, a strong close transmitter (say, WiFi) can noticeably interfere with a receiver of a weak signal (say, GPS) even when the separation of their frequency bands exceeds the respective nominal bandwidths of the channels by orders of magnitude.
In DVB-T/H systems, the nominal signal bandwidth is designed as 6 to 8 MHz, which leads to a much higher chip/code rate than that in GPS L1 systems, thereby improving the precision of timing.
Moreover, while adaptive equalization methods compensated for imperfections within the nominal three-kilohertz bandwidth of the voice circuit, advanced modulation methods permitted transmission at still higher data rates over this bandwidth.
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