Spread spectrum and Pseudonoise Sequences

ثبت نشده
چکیده

• Spread Spectrum multiple access (SSMA): In spread spectrum, the transmission bandwidth of the signals is several orders of magnitude greater than the minimum bandwidth required for transmitting a given piece of information. However, many users can share the same spread spectrum bandwidth without interfering with one another. Spread spectrum uses encoding techniques that are different than the ones we discussed in the preceding chapter; these will be the focus of this chapter. The two most common techniques for implementing SSMA are frequency-hopping spread spectrum (FHSS) and direct sequence spread spectrum (DSSS).

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

Spread spectrum and Pseudonoise Sequences

• Spread Spectrum multiple access (SSMA): In spread spectrum, the transmission bandwidth of the signals is several orders of magnitude greater than the minimum bandwidth required for transmitting a given piece of information. However, many users can share the same spread spectrum bandwidth without interfering with one another. Spread spectrum uses encoding techniques that are different than the...

متن کامل

Pseudo Chaotic Sequence Generator based DS-SS Communication System using FPGA

Spread spectrum (SS) technology is a data transfer technique designed to overcome the interference problems associated with narrow-band very high frequency and ultra high frequency Data transfer systems. Spread spectrum communication is used to reduce jamming of communication signal and provides a highly secure communication. In this paper we specifies the Field Programmable Gate Array (FPGA) i...

متن کامل

Design and Realization of an FPGA-Based Generator for Chaotic Frequency Hopping Sequences

Chaos-based pseudonoise (PN) sequences for spread spectrum (SS) communications ranks amongst the most promising applications of chaos to communications. This paper deals with the design and realization of a chaotic frequency hopping (FH) sequence generator that is compatible with current FH/SS technologies. A simplistic generator architecture adopting nonlinear auto-regressive (AR) filter struc...

متن کامل

Comparison of Performance between AND and Majority Logic Type Nonlinear Feedforward Logic Pseudonoise Sequence Generators

Two classes of nonlinear feedforward logic (NLFFL) pseudonoise (PN) code generators based on the use of AND and majority logic (ML) gates are compared. Crosscorrelation and code-division multiple-access (CDMA) properties of properly designed NLFFL sequences are found to be comparable with the properties of well-known linear PN codes. It is determined that code design employing ML gates with an ...

متن کامل

Analysis and Optimization of Direct Sequence Spread Spectrum Scheme for an Unmanned Aerial Vehicle PPM Control Signal

Binary pulse-position modulated (PPM) control signal is widely used in remotely controlled unmanned aerial vehicles. It consists of data frames, which contain a synchronizing pulse followed by a number of shorter pulses equal to the number of channels N. In this paper we present analysis and optimization of direct sequence spread spectrum (DS-SS) scheme for PPM control signal protection. That s...

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