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Table 2 Computational complexity of pre-filtering, BJ and DE

From: Sub-carrier shaping for BOC modulated GNSS signals

Algorithm

Number of complex correlators

Notes

BJ

5--

bipolar/binary

The local code is a bipolar sequence and code multiplication can be effectively implemented using sign changes Additional logic/circuitry is required for the generation of the local subcarrier replica. The number of multiplications is double since local code and sub-carrier are wiped-off separately

DE

5--

bipolar/binary

 

MMSES (time domain implementation and independent phase tracking)

3--real

1--bipolar/binary (for independent phase tracking)

The filtered local code is stored in memory and multi-bit multiplications are required for the code wipe-off