Generation of wideband m-sequences: A low-cost approach

“…Maximum-length sequence (m-sequence) is one of the PN code types that plays a key role in many communication technologies such as spread spectrum systems. Numerous digital circuits have used msequence code due to its simplicity in the design and stability in generating the code using a linear feedback shift register (LFSR) [9].…”

Section: Introductionmentioning

confidence: 99%

Ultra-low power m-sequence code generator for body sensor node applications

2019

View full text Add to dashboard Cite

show abstract

“…For this purpose, a variety of optimized binary sequences with different individual advantages and disadvantages are available. Maximum length sequences (MLS) can easily be generated by using a linear feedback shift register (LFSR) [1,2]. However, since dynamic range is linked to the sequence length for this type of sequence, a long MLS is needed to achieve a high dynamic range.…”

Section: Introductionmentioning

confidence: 99%

A low-noise and flexible FPGA-based binary signal measurement generator

Notzon

Storch

Musch

et al. 2019

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

In the area of electromagnetic metrology, binary coded excitation signals become more and more important and various binary coded sequences are available. The measurement approach is to assess the impulse response function of a device under test by correlating the response signal with the excitation signal. In order to achieve a high measurement reproducibility as well as a high dynamic range, the generated binary coded signals have to provide low-noise. In this contribution, a low-noise signal generator realized with a field programmable gate array is presented. The performance investigation of different kinds of binary coded excitation signals and different correlation concepts have been practically investigated. With a chip rate of 5 Gchip/s, the generator can be utilized for ultra-wideband applications. In order to allow for a low-noise and long-term stable signal generation, a new clock generator concept is presented and results of phase noise measurements are shown. Furthermore, an algorithm to fast and precisely shifting the time lag between two binary coded signals for correlating excitation and response signals with a hardware correlator is presented. Finally, the realized demonstrator system is tested using two commonly used types of binary coded sequences.

show abstract

“…Maximum-length sequence (m-sequence) is one of the PN code types that plays a key role in many communication technologies such as spread spectrum. Numerous digital circuits have used m-sequence code due to its simplicity in the design and stability in generating the code using a linear feedback shift register (LFSR) [5].…”

Section: Introductionmentioning

confidence: 99%