Simplified acquisition apparatus and method for a Bluetooth receiver

A simplified acquisition apparatus for a Bluetooth receiver which can perform a correlation equation for both “received access code” (ACC) and “received synchronization sequence” (SYNC) of enhanced data rate (EDR), comprising:

• a phase differentiator, used for computing a phase difference of received samples and outputting a one-bit (1-bit) output or an M-bit output;
• a plurality of basic building blocks, used for computing a plurality of correlation output bits, having M rows and J columns;
• M 1-bit switches in front of each row of the M rows, used for selecting a plurality of input bits to a first building block of each row of the M rows either from a basic building block of a last column of previous row of the M rows or from the M-bit output of the phase differentiator,
• wherein the correlation equation is used for
• (a) computing at most M×J, 1-bit, an ACC correlation with received samples from the plurality of correlation output bits of the plurality of basic building blocks of the phase differentiator by setting the above M 1-bit switches for selecting a plurality of input bits to a first building block of each row of the M rows from a basic building block of a last column of previous row of the M rows, and
• (b) computing at most J, M-bit, a SYNC correlation with received samples from the plurality of correlation output bits of the plurality of basic building blocks of the phase differentiator by setting the above M 1-bit switches for selecting a plurality of input bits to a first building block of each row of the M rows from the M-bit output of the phase differentiator.