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The phenomenon of ideal synchronization of a pair of identical dynamical systems coupled by a one-to-one negative feedback mechanism is described and explained.
These methods often require ideal synchronization or massive experimental data.
With ideal synchronization, it achieves single-user transmission performance.
In this paper, we assume ideal synchronization and also assume no path loss and shadowing loss.
In order to minimize the impact of this phenomenon, quite often, (almost) ideal synchronization between cells is considered.
The proposed FS-RX with ideal synchronization nearly achieves the performance of the SCS-RX both with 1 and 4 users.
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Due to oscillator inaccuracies and non-ideal transmitter/receiver synchronization, the orthogonal properties are easily broken down and result in errors due to frequency offsets.
Under ideal conditions including synchronization and no noise, Fig. 5 illustrates a D-BFT result for a 10-chirp-rate-modulated signal.
The overall conclusion is that the FS-RX both with ideal and practical synchronization provides performance close to the SCS-RX yet allowing for an efficient DFT-based implementation.
In Figures 6 and 7, we report average BER as a function of the SNR for a maximum carrier frequency offset normalized to the subcarrier spacing The ideal curves assume perfect synchronization and channel estimation, while the other curves assume practical synchronization and channel estimation with a single iteration for the SCS-RX and the US-RX.
Curve A shows the SIR due only to mobility when synchronization is ideal.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com