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The timing information could also be controlled using a modulation code.
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Subchannel diversity means that a connection uses a different modulation coding scheme (MCS) on various subchannels because the connection encounters various channel qualities on various subchannels [2].
IEEE 802.16j uses an adaptive modulation coding scheme (MCS) for allocating different data transmission rates to different channel conditions.
Therefore, assuming that approximately 60 bits are required for signaling each burst [2] and using a QPSK modulation with a code rate 1/3, the downlink signaling zone (i.e., the DL-MAP) would span less than 2 OFDM symbols.
The experiment used a coded modulation, which enables a study of spectra with high spatial and spectral resolutions.
Using the previously derived (per PRB) we define a rate function to be the data rate which a user can achieve on a single PRB with average using an appropriate modulation and coding scheme.
However, slots assigned to different users will typically use a different modulation and coding scheme.
A serial digital transmission of multi-channel audio signals has been reported in [19], where an analog multi-channel audio signal was converted into a digital audio signal by using a 44.1-kHz pulse code modulation (PCM) technique.
Then, it is extended to include coded -PSK modulation using trellis coded modulation (TCM).
The multirate operation is achieved using adaptive modulation and coding in the PHY.
The system capacity B may be dynamic as the IEEE 802.16e standards on PHY support multiple transmission rates by using adaptive modulation and coding (AMC) schemes.
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