Fundamental Source Coding Techniques in Wireless Communication
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This article discusses fundamental source coding techniques frequently utilized in wireless communication, such as QPSK and MASK. In wireless systems, source coding plays a critical role in converting raw information into signals optimized for transmission. QPSK (Quadrature Phase Shift Keying) is a widely-used modulation scheme that maps two bits onto a single complex symbol, typically implemented through phase shifts of 0°, 90°, 180°, and 270° using I/Q modulation. MASK (M-ary Amplitude Shift Keying) encodes multiple bits per symbol by varying amplitude levels, thereby improving spectral efficiency. These techniques enhance data transmission efficiency and communication quality through optimized constellation mapping and symbol rate adjustments. Implementation typically involves digital signal processing algorithms for symbol mapping, pulse shaping, and carrier modulation in software-defined radio systems.
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