Advanced differentially non-coherent code acquisition in jamming and data modulation
نویسندگان
چکیده
In this paper we consider differentially non-coherent code timing acquisition in Direct-Sequence Code-Division Multiple Access (DS-CDMA) communication system. Recently, an advanced method for differentially non-coherent acquisition, DCMUSIC, was proposed and noticed to combine the benefits of both conventional differentially non-coherent matched filter and traditional MUSIC estimator in a meaningful way. In this paper we evaluate DC-MUSIC in the presence of tone jamming and data modulation. Especially, we study the effects of imperfect removal of data modulation. This is crucial for any differentially coherent/non-coherent acquisition schemes, since they exploit temporal correlation of signals. Simulation results are presented.
منابع مشابه
Differentially Coherent Code Acquisition in Jamming and Data Modulation
This paper considers the use of differentially coherent (DC) matched filter (MF) code acquisition in a direct-sequence (DS) spread-spectrum system. Simulation results in tone jamming and with data modulation are presented. The performance of structure is compared to conventional noncoherent (NC) MF acquisition. The performance measure is the mean acquisition time, TMA. The results indicate that...
متن کاملImproving Long PN-Code Acquisition in the Presence of Doppler Frequency Shifts
Wireless communication is the major form of connection nowadays. In most cases it exploits the benefits of the spread spectrum techniques to overcome channel introduced corruptions like Doppler residual frequency, noise, interference and jamming. These techniques also enhance the security and quality of the link. Using long spreading pseudo-noise codes provides further security for the link tho...
متن کاملQuasi-Coherent Noise Jamming to LFM Radar Based on Pseudo-Random Sequence Phase-modulation
A novel quasi-coherent noise jamming method is proposed against linear frequency modulation (LFM) signal and pulse compression radar. Based on the structure of digital radio frequency memory (DRFM), the jamming signal is acquired by the pseudo-random sequence phase-modulation of sampled radar signal. The characteristic of jamming signal in time domain and frequency domain is analyzed in detail....
متن کاملImpact of Multipath Fading and Partial-Band Interference on the Performance of a COFDM/CDMA Modulation Scheme for Robust Wireless Communications
The performance of a COFDM’CDM4 radio communication system in the presence of partial-band jamming is presented where the eflects of multipath and additive noise are included The importance of interleaving and coding is emphasised and their impact on the bit error-rate performance is evaluated. In the first part of the paper, the effect of jamming on a COFDA4 system is obtained under worst-case...
متن کاملDifferentially coherent code acquisition in the MIMO-aided multi-carrier DS-CDMA downlink
Both differentially coherent and non-coherent code acquisition schemes designed for the multiple-input multiple-output (MIMO)-aided multi-carrier (MC)-DS-CDMA downlink are analysed, when communicating over uncorrelated Rayleigh channels. The attainable mean acquisition time (MAT) performance is studied as a function of both the number of multiple transmit/multiple receive antennas and that of t...
متن کامل