Patent ID: 8731075

Claim:
A baseband processor comprising: a modulating unit configured to generate an orthogonal frequency division multiplexing (OFDM) symbol by modulating a bit stream; and a converting unit configured to convert the OFDM symbol from a frequency domain into a time domain, and to adjust a frequency of the OFDM symbol according to a frequency hopping sequence to perform frequency hopping in a digital domain and in the time domain, wherein the converting unit comprises: a time-frequency code unit configured to generate a band selection signal based on a time-frequency code corresponding to the frequency hopping sequence; an IFFT unit configured to convert the OFDM symbol from the frequency domain into the time domain; and a digital mixer configured to perform the frequency hopping of the converted OFDM symbol in the time domain in response to the band selection signal, wherein the baseband processor further comprises a digital-to-analog converter configured to convert the OFDM symbol provided from the converting unit from the digital domain into an analog domain, and wherein the digital-to-analog converter has a sampling rate corresponding to at least two frequency bands.