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By Dabove, Paolo; Manzino, Ambrogio; De Agostino, Mattia

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Therefore, in order to determine the correct bit sequence for the signal snap-shot, the acquisition stage needs to test all possible data sequence in a predetermined uncertainty. Then the maximum likelihood estimator is used for decision. e. 4D search-space). e. a data bit sequence candidate), the whole search-space must be re-computed. e. 092 MHz and Tcoh = 1 s. However, (43) can be rewritten as R= M ∑ m =1 dm Rm (45) where Rm is partial correlation value with representation in (5). , R M then save these values for testing with all possible values of bit-phase.

When the components are combined, the increase in the power consumption with respect to the L2C- CM only signal case is negligible. If both the CM and the CL signal components are processed independently then the resource utilisation almost doubles compared to the CM only processing. 1 Single signal component (E1b or E1c) Because of the use of memory codes, the baseband can eliminate the shift register and store the local spreading code in memory. Therefore there is a small saving in terms of the flip-flops/registers compared to the GPS L1 C/A architecture.

Typically, 3-bit uniform NCO phase quantisation and 2-bit amplitude quantisation with 4 levels {±1, ±2} is used. More bits in the phase and amplitude quantisation increases the Spurious-Free-Dynamic-Range (SFDR) and reduces the quantisation noise. However this has a significant impact on the size of succeeding stages. 3 Carrier mixer ( N1 ) The carrier mixer basically multiplies the input signal with the local carrier bits. Since the resulting values will only have 8 levels {±1, ±2, ±3, ±6}, a 3-bit encoding is sufficient.

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