Abstract: Disclosed are a method of and a system for interference with a transmission of an Orthogonal Frequency-Division Multiplex, OFDM, signal. The OFDM signal comprises multiple data frames which respectively comprise a preceding frame preamble and a succeeding frame preamble. The method comprises: receiving a succeeding frame preamble of a first data frame of the multiple data frames; identifying a first radio power and a first equalization information associated with the received succeeding frame preamble; determining a second radio power on a same order of magnitude as the first radio power, and a second equalization parameter differing from the first equalization parameter; receiving a preceding frame preamble of a second data frame of the multiple data frames; and retransmitting the succeeding frame preamble of the first data frame concurrently with a succeeding frame preamble of the second data frame.

Abstract: Two preferred embodiments provide slot synchronization of an initial cell search Two Finite Impulse Response (FIR) filters are used to correlate the synchronization codes transmitted in the downlink (forward link). A sign bit is taken after the first FIR to significantly reduce the hardware requirements for the second FIR, and thus the whole system. The correlated results from the second FIR can be further processed using two different algorithms. The first adds a square operation to the correlated results whilst the second takes the magnitude before passing to the next stage. Regardless of which algorithm is adopted, the results are accumulated (I and Q), instead of averaged, and stored in a memory location for each successive correlation over the same location in different slots. The physical-layer processor (PLP) then reads the accumulated results from the memory location and searches for the peak position corresponding to the slot boundary.

Abstract: A control signal generating circuit (460) for an automatic frequency control (AFC) circuit (465), in accordance with the present invention receives a digital timing control signal directly from the output of a digital loop filter (138) of a tracking circuit (430), and produces a frequency control signal that is provided to a VCXO (110). The control signal generating circuit (460) comprises a multiplier (462) and an integrator (466) which are relatively simple to implement, and does not require complex processing, such as determining an inverse tangent as taught by the prior. Consequently, approximation errors associated with inverse tangent processing are avoided.

Abstract: A TFCI decoder (600) in accordance with the present invention comprises a comparator (605), which is coupled to receive encoded TFCI codewords (110) at a first input (610). At a second input (645), the comparator (605) is coupled to a TFCI candidate codeword generator (625) that generates all the possible candidate TFCI codewords (647) from all possible corresponding unencoded TFCI source data. When an encoded TFCI codeword (110) is received at the first input (610), the comparator (605) compares the TFCI codeword (110) with each of the possible candidate TFCI codewords (647) provided to the second input (645), and the corresponding TFCI source data (650) is identified. Subsequently, the identified TFCI source data (650) is latched in a TFCI source data memory (640) by a latch signal (620) provided from an output (630) of the comparator (605).