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OQAM (Offset Quadrature Amplitude Modulation) is a signal processing technique that is used to increase the efficiency of wireless communication. This technique employs a special type of modulation that enables the transmission of more data over a given bandwidth. By using OQAM, it is possible to achieve higher spectral efficiency, which means that more data can be transmitted over a given frequency band. This is particularly useful in situations where there is limited bandwidth available, such as in wireless networks where multiple devices are competing for the same frequency range. Additionally, OQAM can help to mitigate certain types of signal distortion, which can improve the overall quality of the transmitted signal.