Communication device and operating method

A communication device, comprising:

• a receiver circuit configured to receive a signal;
• a controller configured to control said receiver circuit, wherein said controller is configured to cause said receiver circuit to operate either in a complex receiver mode or in a real receiver mode;
• wherein the controller is configured to cause said receiver circuit to operate in the real receiver mode until the signal is successfully acquired;
• wherein the controller is further configured to switch the receiver circuit from the real receiver mode to the complex receiver mode upon or after a successful acquisition of the signal;
• wherein the successful acquisition of the signal is based on a detection of a synchronization field within said signal, wherein the synchronization field is included in a data frame.

A communication device, comprising:

• a receiver circuit configured to receive a signal;
• a controller configured to control said receiver circuit, wherein said controller is configured to cause said receiver circuit to operate either in a complex receiver mode or in a real receiver mode;
• wherein the controller is configured to cause said receiver circuit to operate in the real receiver mode until the signal is successfully acquired;
• wherein the controller is further configured to switch the receiver circuit from the real receiver mode to the complex receiver mode upon or after a successful acquisition of the signal;
• wherein the controller is further configured to wake up the receiver circuit before switching the receiver circuit from the real receiver mode to the complex receiver mode.

A communication device, comprising:

• a receiver circuit configured to receive a signal;
• a controller configured to control said receiver circuit, wherein said controller is configured to cause said receiver circuit to operate either in a complex receiver mode or in a real receiver mode;
• wherein the controller is configured to cause said receiver circuit to operate in the real receiver mode until the signal is successfully acquired;
• wherein the controller is further configured to switch the receiver circuit from the real receiver mode to the complex receiver mode upon or after a successful acquisition of the signal;
• wherein the controller is further configured to wake up the receiver circuit after switching the receiver circuit from the real receiver mode to the complex receiver mode.

A communication device, comprising:

• a receiver circuit configured to receive a signal:
• a controller configured to control said receiver circuit, wherein said controller is configured to cause said receiver circuit to operate either in a complex receiver mode or in a real receiver mode;
• wherein the controller is configured to cause said receiver circuit to operate in the real receiver mode until the signal is successfully acquired;
• wherein the controller is further configured to switch the receiver circuit from the real receiver mode to the complex receiver mode upon or after a successful acquisition of the signal;
• wherein the controller is further configured to reset a center frequency upon or after switching the receiver circuit from the real receiver mode to the complex receiver mode.

A communication device, comprising:

• a receiver circuit configured to receive a signal;
• a controller configured to control said receiver circuit, wherein said controller is configured to cause said receiver circuit to operate either in a complex receiver mode or in a real receiver mode;
• wherein the controller is configured to cause said receiver circuit to operate in the real receiver mode until the signal is successfully acquired;
• wherein the receiver circuit is configured to operate in the complex receiver mode by default, and wherein the controller is configured to switch the receiver circuit from the complex receiver mode to the real receiver mode if no signal is found within a predefined amount of time after the receiver circuit has started up.

A method of operating a communication device, wherein the communication device comprises a receiver circuit and a controller, the method comprising:

• receiving, by the receiver circuit, a signal;
• controlling, by the controller, the receiver circuit;
• wherein the controller causes said receiver circuit to operate either in a complex receiver mode or in a real receiver mode;
• wherein the controller causes said receiver circuit to operate in the real receiver mode until the signal is successfully acquired;
• wherein the controller applies, when the receiver circuit operates in the real receiver mode, a local oscillator frequency which is different from a local oscillator frequency applied when the receiver operates in the complex receiver mode.