Dual-Mode Millimeter Wave Transceiver Using Golay Sequences

The patent implements a dual-mode transceiver that can operate in both OFDM and single-carrier modes, allowing a single device to serve multiple functions and communicate with different types of devices. The transceiver includes configurable components such as an IFFT/FFT module, serial-to-parallel converter, and modulation/demodulation units that can be activated based on the operating mode, enabling universal compatibility without requiring separate dedicated hardware for each mode.

The patent applies Golay complementary codes to the preamble sequence before transmission. The encoder pre-processes the preamble by convolving it with Golay codes, and the receiver uses matched filtering with the same Golay codes to correlate and detect the preamble. This preliminary encoding and corresponding decoding process enhances reliability by providing robust correlation peaks for synchronization while maintaining efficient detection.

The patent segments the OFDM signal processing into distinct functional blocks: an IFFT module that generates time-domain signals from frequency-domain data, a serial-to-parallel converter that reorganizes data streams, and a cyclic convolution module that applies the windowing function. This segmentation allows each component to be optimized independently, with the cyclic convolution specifically designed to limit the bandwidth of the output signal by convolving the IFFT output with a cyclic prefix, thereby improving frequency reuse through controlled spectral containment.