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Exact(16)
However, such techniques have poor bandwidth utilization as multiple bits are mapped to single narrow pulse.
Next, the coded bits are mapped to (Nnt - Np) QAM constellation points.
When 4-QAM modulation is used, 2n bits are mapped to 2 n 4-QAM symbols.
When BPSK modulation is used, n bits are mapped to 2 n BPSK symbols.
The transmitted bits are mapped to 4-QAM symbols, then passed through an OFDM modulator of length N=64.
In a second configuration, the systematic bits are mapped to better protected places as a priority, and all the other bits are uniformly distributed.
Similar(44)
L o g 2 q bits from the interleaved parity/data bit streams are mapped to the corresponding q-order quadrature amplitude modulation (q-QAM) constellation symbols.
The binary information bit streams are mapped to complex BPSK and M-QAM symbols.
For instance, there are 3 types of bit-patterns are mapped to an α-helical motif.
This paper presents a quasi-cyclic low-density parity-check (LDPC) coded OFDM system, in which the redundant bits of each codeword are mapped to a higher-order modulation constellation.
A rate 1/2 convo-lutional code with generator polynomial (7, 5 8 is used to generate the code bits, which after random interleaving are mapped to QPSK symbols.
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