Narrowband Interference Suppression Performance of Multi-Correlation Differential Detection

نویسنده

  • Surendran K. Shanmugam
چکیده

Radio frequency interference (RFI) is one of the foremost concerns in safety critical applications that utilize GPS. RFI sources either intentional or unintentional at the vicinity of the victim receiver can potentially mask the weak GPS signals. Most commercial receivers are equipped with no or basic level of protection against in-band RFI. Acquisition under strong RFI is more difficult as the GPS receiver has no prior knowledge of both signal and interference parameters. This paper proposes the use of multi-correlation differential detection (MCDD) technique over traditional noncoherent technique for enhanced acquisition under strong RFI. More importantly, the developed MCDD technique provides an efficient means to detect and mitigate narrowband interference for GPS acquisition. A simple CW interference detection/suppression scheme utilizing thee inherent operation of MCDD is proposed. The interference detection/suppression performance of the developed scheme is validated using hardware simulated GPS signals. The paper further extends by demonstrating the advantages of augmenting GPS signal acquisition with interference excision methods. Preliminary analysis using hardware simulated GPS data corrupted with continuous wave (CW) and narrowband interference (NBI) substantiate the superior detection performance of the MCDD technique over traditional noncoherent scheme for GPS acquisition under strong RFI.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Interference Cancellation Schemes in UWB Systems used in Wireless Personal Area Network based on Wavelet based Pulse Spectral shaping and Transmitted Reference UWB using AWGN Channel Model

For high data rate ultra wideband communication system, performance study of mutual interference such as suppression of interference signal by performing pulse shaping from UWB to other narrowband system using wavelet technique and reduction of interference from other narrowband system to UWB system in conjunction with Transmitted-Reference (TR-UWB) signaling scheme with adaptive receivers is a...

متن کامل

Multiuser detection techniques for narrowband interference suppression in spread spectrum communications

| Due to the scarcity of frequency allocations for emerging personal communications services, it has been proposed that spread spectrum (SS) signals be used in such services so that they can be overlaid on existing frequency band occupants. Such SS signals would be constrained in power so as not to interfere with pre-existing, narrowband users. In view of this application, suppression of strong...

متن کامل

Interacting multiple model for adaptive narrowband interference rejection in spread spectrum systems

This paper presents an adaptive code-aided technique for the suppression of narrowband interference (NBI) in direct-sequence code-division multiple access (DS-CDMA) systems. This technique uses a multiuser detector based on the Interacting Multiple Model (IMM) algorithm. This detector is based on the concept that the effective model of the received signal at a time instance can be approximated ...

متن کامل

Narrowband Interference Suppression in Spread Spectrum Communications

Due to the scarcity of frequency allocations for emerging personal communications services, it has been proposed that spread spectrum (SS) signals be used in such services so that they can be overlaid on existing frequency band occupants. Such SS signals would be constrained in power so as not to interfere with pre-existing, narrowband users. In view of this application, suppression of strong n...

متن کامل

Minimum Mean Square Error (MMSE) Receiver Employing 16-QAM in CDMA Channel with Narrowband Gaussian Interference

It has been shown that employing a higher order constellation in conjunction with CDMA can improve the performance of the multiuser system in severe multipath channels. We verify that the performance improvement gained by the above interference suppression technique in the multiuser case continues to hold in the multiuser environment with narrowband Gaussian interference.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007