Dynamic sharing of OFDMA and ATDMA signals

An apparatus for decoding a modulated signal, the apparatus comprising:

• a decoder comprising a mixer and a filter, wherein the decoder is configured to:
• determine a format of the modulated signal, wherein the format comprises either:
• a first format comprising a first type of modulated signal;
• or
• a second format comprising the first type of modulated signal and a second type of modulated signal that is different than the first type of modulated signal;
• and
• decode the modulated signal, comprising:
• determining a frequency shift amount based on the format of the modulated signal;
• shifting, using the mixer, a frequency band of the first type of modulated signal or frequency bands of the first type of modulated signal and the second type of modulated signal from an original position to a shifted position, thereby shifting a center frequency of the first type of modulated signal by the frequency shift amount;
• and
• filtering, using the filter, which takes into account the first or second format of the modulated signal, signals outside of the frequency band of the shifted first type of modulated signal.