Time-domain windowing function

摘要

A smart utility network (SUN) device that includes an orthogonal frequency-division multiplexing (OFDM)-based transmitter. The OFDM-based transmitter including a signal processor to convert data from a frequency-domain to a time-domain using an inverse fast Fourier transform (IFFT) and configured to perform a time-domain windowing function based on a Hanning window on OFDM symbols.

主权项

1. A smart utility network (SUN) device, comprising:
an orthogonal frequency-division multiplexing (OFDM)-based transmitter; and a signal processor to convert data from a frequency-domain to a time-domain using an inverse fast Fourier transform (IFFT) and configured to perform a time-domain windowing function on cyclic extensions of OFDM symbols, wherein performing the time-domain windowing function on cyclic extensions of OFDM symbols comprises: applying weights of a monotonically decreasing function that produces weights between 1 and 0 to a cyclic extension of an end of a first symbol, thereby generating a first transition extension component; applying weights of a monotonically increasing function that produces weights between 0 and 1 to a cyclic extension of a beginning of a second symbol, thereby generating a second transition extension component; and combining the first and second transition extension components, thereby generating a combined transition extension, the combined transition extension providing for a ramping down of a transmission of the first symbol and ramping up the transmission of the second symbol during a subsequent transmission of the symbols and combined transition extension.