Patent ID: 6075408
Filing Date: 2000-06-13
Classification: H04L

Abstract:
A method for generating an error estimate as input for an error recovery loop of a demodulator, the demodulator receiving an offset quadrature phase shift keyed (OQPSK) signal having a symbol interval, the method comprising the operations of:(a) receiving at least four consecutive complex samples z.sub.-1/2, z.sub.0, z.sub.1/2 and z.sub.1, the consecutive complex samples being obtained by sampling the OQPSK signal at half the symbol interval, each of the complex samples z.sub.-1/2, z.sub.0, z.sub.1/2 and z.sub.1 having a real part and an imaginary part; and(b) computing the error estimate based on z.sub.-1/2, z.sub.0, z.sub.1/2 and z.sub.1.