A method, comprising: in a Wireless Local Area Network device, communicating on a given communication channel using one or more primary transmission/reception chains; concurrently with communicating on the given communication channel using the primary transmission/reception chains, evaluating signal activity on one or more alternative communication channels using an auxiliary reception chain, which shares a common antenna, a common front-end, and a common Low-Noise Amplifier with one of the primary transmission/reception chains; characterized by setting a gain of the common Low-Noise Amplifier by: checking whether signals are received in the auxiliary reception chain, the primary transmission/reception chain, or both; if the signals are received in both the auxiliary reception chain and the primary transmission/reception chain, setting a gain of the common Low-Noise Amplifier based on a first signal received via the common Low-Noise Amplifier by the primary transmission/reception chain on the given communication channel or on a second signal received via the common Low-Noise Amplifier by the auxiliary reception chain on the one or more alternative communication channels; otherwise, if the signal is received only in the auxiliary reception chain and not in the primary transmission/reception chain, setting the gain of the common Low-Noise Amplifier based on the signal received in the auxiliary reception chain; otherwise, if the signal is received only in the primary transmission/reception chain and not in the auxiliary reception chain, setting the gain of the common Low-Noise Amplifier based on the signal received in the primary transmission/reception chain. in a Wireless Local Area Network device, communicating on a given communication channel using one or more primary transmission/reception chains; concurrently with communicating on the given communication channel using the primary transmission/reception chains, evaluating signal activity on one or more alternative communication channels using an auxiliary reception chain, which shares a common antenna, a common front-end, and a common Low-Noise Amplifier with one of the primary transmission/reception chains; characterized by setting a gain of the common Low-Noise Amplifier by: checking whether signals are received in the auxiliary reception chain, the primary transmission/reception chain, or both; if the signals are received in both the auxiliary reception chain and the primary transmission/reception chain, setting a gain of the common Low-Noise Amplifier based on a first signal received via the common Low-Noise Amplifier by the primary transmission/reception chain on the given communication channel or on a second signal received via the common Low-Noise Amplifier by the auxiliary reception chain on the one or more alternative communication channels; otherwise, if the signal is received only in the auxiliary reception chain and not in the primary transmission/reception chain, setting the gain of the common Low-Noise Amplifier based on the signal received in the auxiliary reception chain; otherwise, if the signal is received only in the primary transmission/reception chain and not in the auxiliary reception chain, setting the gain of the common Low-Noise Amplifier based on the signal received in the primary transmission/reception chain. checking whether signals are received in the auxiliary reception chain, the primary transmission/reception chain, or both; if the signals are received in both the auxiliary reception chain and the primary transmission/reception chain, setting a gain of the common Low-Noise Amplifier based on a first signal received via the common Low-Noise Amplifier by the primary transmission/reception chain on the given communication channel or on a second signal received via the common Low-Noise Amplifier by the auxiliary reception chain on the one or more alternative communication channels; otherwise, if the signal is received only in the auxiliary reception chain and not in the primary transmission/reception chain, setting the gain of the common Low-Noise Amplifier based on the signal received in the auxiliary reception chain; otherwise, if the signal is received only in the primary transmission/reception chain and not in the auxiliary reception chain, setting the gain of the common Low-Noise Amplifier based on the signal received in the primary transmission/reception chain.