Recovering data from a secondary one of simultaneous signals, such as orthogonal-frequency-division-multiplexed (OFDM) signals, that include a same frequency

摘要

An embodiment of a receiver includes a channel estimator and a data-recovery unit. The channel estimator is configured to determine a characteristic of a channel over which a first signal, which is received simultaneously with a second signal, propagated, the first and second signals respectively having first and second components that include approximately a frequency. And the data-recovery unit is configured to recover data from the first signal in response to the determined channel characteristic. For example, such a receiver may be able to receive simultaneously, and over the same channel space, orthogonal-frequency-division-multiplexed (OFDM) signals that include one or more of the same subcarrier frequencies, and to recover data from one or more of the OFDM signals despite the frequency overlap. A receiver with this capability may allow an increase in the effective bandwidth of the channel space, and thus may allow more devices to simultaneously share the channel space.

主权项

1. A receiver comprising:
a channel estimator configured to
simultaneously receive first and second signals over a channel,determine a channel characteristic of the channel, the first and second signals respectively having first and second components, the first component having a first pilot subcarrier modulated with a first pilot sub-symbol and with at least one data sub-symbol, the at least one data sub-symbol being orthogonal to the first pilot sub-symbol, the second component having a second pilot subcarrier modulated with a second pilot sub-symbol, the second pilot sub-symbol being orthogonal to the first pilot sub-symbol and the at least one data sub-symbol; and a data-recovery unit configured to recover data from the first signal in response to the determined channel characteristic by recovering the at least one data sub-symbol from the first component of the first signal.