Abstract
Continuous Phase Modulation–Direct Sequence Spread Spectrum (CPM-DSSS) is a promising scheme for a secured Point-to-Point (P2P) communication system having Anti-Jamming (AJ) capabilities. However, like other communication systems, synchronization of CPM-DSSS based systems is required for reliable detection of data. This paper presents a novel algorithm for estimating the timing and phase offset for binary full-response CPM-DSSS based systems. A burst mode transmission is considered here, and within each burst, a training sequence is embedded along with data. Firstly, the entire burst is spread using DSSS and then modulated with CPM, which is later upconverted and passed on to the channel. After down-conversion at the receiver, the proposed algorithm estimates timing and phase offset from the received spread training sequence. Then estimation accuracy of the proposed algorithm is compared with the state-of-the-art. The results indicate that the proposed joint estimator is superior by 9 dB and 10 dB for the estimation of timing and phase offset, respectively, as compared to the existing algorithm. Furthermore, the estimator’s variance for three different frequency pulses is compared with Modified Cramer-Rao Bound (MCRB). The results suggest that the phase offset estimator’s variance approaches MCRB for all Signal-to-Noise Ratios (SNRs). The effectiveness of the proposed algorithm in the multipath fading channel is also demonstrated.
Highlights
In Point-to-Point (P2P) communication, machines and equipment communicate with each other directly, with or without very little involvement of any network infrastructures
A robust Data Aided (DA) algorithm is proposed for the estimation of timing and phase offset of Continuous Phase Modulation (CPM)-DSSS based secured communication link trum (DSSS) scheme, applicable to next-generation P2P communication systems as well as military Software Defined Radios (SDRs) for example, the proposed CPM-DSSS scheme combines the benefits of CPM and DSSS schemes, i.e., higher spectral efficiency and strong anti-jamming capability [13], to make it a strong candidate for tactical wideband SDR waveforms and other secure and high throughput networks
We have presented a novel algorithm to jointly estimate the timing and phase offset for burst mode binary fullresponse CPM-DSSS systems
Summary
In Point-to-Point (P2P) communication, machines and equipment communicate with each other directly, with or without very little involvement of any network infrastructures. A robust Data Aided (DA) algorithm is proposed for the estimation of timing and phase offset of CPM-DSSS scheme, applicable to next-generation P2P communication systems as well as military Software Defined Radios (SDRs) for example, the proposed CPM-DSSS scheme combines the benefits of CPM and DSSS schemes, i.e., higher spectral efficiency and strong anti-jamming capability [13], to make it a strong candidate for tactical wideband SDR waveforms and other secure and high throughput networks. The algorithms presented in this paper are non-DA, have feed-forward structure, suitable for burstmode transmissions, and are used to estimate the symbol timing, carrier frequency offset and carrier phase These three schemes are: the sample-point scheme, the mean-function scheme, and the correlation function (CF) scheme.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
