Signal correlation technique for a receiver of a spread spectrum signal including a pseudo-random noise code that reduces errors when a multipath signal is present

A method of decoding an incoming signal containing a carrier having encoded thereon a pseudo-random noise (PRN) binary code, comprising:

• locally generating first and second gating signals that relate to the PRN code of the incoming signal, said first and second gating signals having different shapes, wherein one of said first and second gating signals is shaped symmetrically about an edge of the PRN binary code in the incoming signal, and the other of said first and second gating signals is shaped asymmetrically about an edge of the PRN binary code in the incoming signal,
• mixing the incoming signal with the first locally generated gating signal, thereby to generate a first mixed signal,
• mixing the incoming signal with the second locally generated gating signal, thereby to generate a second mixed signal,
• combining the first and second mixed signals, thereby to generate an error signal, and
• adjusting together a phase of the first and second locally generated gating signals relative to that of the PRN binary code of the incoming signal in order to drive said error signal to a reference.