Apparatus and Method for Selecting Optimal Signal Using Auxiliary Equalization in Diversity Receiver

An optimal signal selecting apparatus using auxiliary equalization in a diversity receiver, comprising:

• a switch for individually receiving baseband signals, which are candidate signals, except a baseband signal selected as a current optimal signal;
• a sync recovery unit for extracting sync information from the candidate signals inputted by the switch;
• an auxiliary equalizer for channel distortion-equalizing the inputted candidate signals based on the extracted sync information;
• an SNR measuring unit for measuring SNRs of the inputted candidate signals and the channel-equalized candidate signals;
• a status bank for storing the measured SNRs and the extracted sync information;
• and
• an optimal signal selector for controlling the switch to individually receive the candidate signals, selecting an optimal candidate signal from the candidate signals based on the sync information and the SNRs stored in the status storage, and replacing the optimal signal with an optimal candidate signal when reception quality of the current optimal signal is poor.

An optimal signal selecting method using auxiliary equalization in a diversity receiver, comprising the steps of:

• a) selecting one of baseband signals as an initial optimal signal;
• b) extracting sync information from baseband signals, which are candidate signals, except the baseband signal selected as the current optimal signal;
• c) channel-equalizing the candidate signals based on the extracted sync information;
• d) measuring SNRs of the candidate signals before and after the step c);
• e) selecting an optimal candidate signal from the candidate signals based on the extracted sync information and the measured SNRs;
• and
• f) when reception quality of the current optimal signal is poor, replacing the current optimal signal with an optimal candidate signal.