Performance Analysis of Optical Phase Diversity FSK Receiver Using Delay-and-Multiplying Discriminators

Abstract

The performance of optical phase diversity FSK receiver using delay-and-multiplying discriminator is analyzed. The bit error rate is estimated in terms of received optical power, frequency deviation, laser linewidth, and photodetector responsivity. It shows that, for small frequency deviation, a noise floor appears when the laser linewidth is comparable with the data rate but for large frequency deviation, the linewidth has only modest effect on the bit error rate. The analytical results also compared favorably with the experimental data reported in the literature.

BER performance evaluation for CPFSK phase and polarization diversity coherent optical receivers

“…It is shown in Appendix C that this probability for a given A and a may be expressed by (21), where the functions px (x) and pE (4) are the pdf's of the generalized chi distribution log (BER)-6 -7.…”

“…Equation (21) together with (48) and (49) give the value of the BER (A, a) for a particular realization of the phasenoise process A and a given phase angle a. To obtain the value of BER in the worst case it is necessary to average BER (A, a) over all possible realization of A and then select that value of a for which the BER has a maximum.…”

“…The topics that will be addressed here are dealt with in [20] and [21], but the analysis of [20] does not include the lasers' phase noise, whereas [21] does not account for the non-Gaussian character of the probability density functions of the noise at the sampler. Moreover, both papers neglect the noise correlation.…”

Frequency Spectra in an Optical CPFSK Heterodyne Delay Demodulating Receiver using Manchester Coding

“…However, narrowband CPFSK with a modulation index of around 1 offers a compact spectrum, which makes it very suitable for optical FDM systems. At the receiving end a narrowband CPFSK signal can be demodulated using a delay and multiply detector [1][2][3][4].…”

<title>Theoretical analysis of optical phase diversity FSK receivers</title>

“…We specify the low pass filter, LPF1, to be a finite-time integrator with integration time T1 such that Vi,q(t)=+Jri,q(a) d (11) with the associated frequency response, sin(irfTi)/irtTi. The equivalent noise bandwidth of LPF1 is 1/Ti.…”