Software-defined GPS receiver on USRP-platform

Thompson, Elizabeth A.; Clem, Nathan; Renninger, Isaac; Loos, Timothy

doi:10.1016/j.jnca.2012.01.020

Cited by 20 publications

(11 citation statements)

References 4 publications

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“…It is about -130 dBm [15]. This means that the signal power is much lower than noise, and the SNR (Signal-to-Noise Ratio) is minus.…”

Section: Signal Sourcementioning

confidence: 97%

“…[15], we also use an active antenna to raise the power of the weak signal. However, we use an WBX daughter board which covers the GPS band rather than an RFX900 daughter board in [15]. As a result, the down-converter module is unused.…”

Section: Signal Sourcementioning

confidence: 99%

“…In an addition, for GPS, as described before, it uses "Direct Sequence Spread Spectrum" to promote the SNR, and through the quantization bits to do this is limited. Reference [15] analysed the SNR loss to quantization bits. It shows that SNR decrease is negligible when the quantization bits decreased to 4 bits.…”

Section: Quantization Bitsmentioning

confidence: 99%

“…The system can simulate GPS signal, record and replay GPS signal. Reference [15] shows that using USRP to record real GPS signal then using Matlab to decode it.…”

Section: Introductionmentioning

confidence: 99%

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Practicing a record-and-replay system on USRP

Chen

Zhang

Wang

et al. 2013

Proceedings of the Second Workshop on Software Radio Implementation Forum

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Signal recording and replaying is widely used in data analysis, device test, etc. Motivated by this fact, our paper focuses on developing a low-cost record-and-replay prototype based on USRP (Universal Software Radio Peripheral). In particular, we designed and developed a GPS (Global Positioning System) record-and-replay system, which can sample the real GPS signal and then output the analog GPS signal to other devices with cable. In this prototype, we first design the record flow graph and the replay flow graph for USRP, which is verified in the FM band with the FM (Frequency Modulation) broadcasting. After that, we replace the passive antenna with one active antenna suit to amplify the small power GPS signal, lower the quantization bits to reduce the data rate in order to support the wide bandwidth of the GPS signal. Finally, our GPS record-and-replay system is tested and verified by a real GPS receiver. The good performance of our GPS record-and-replay system showed that USRPs can not only used in academia as experiment devices but also used in industry as low-cost wireless auxiliary devices.

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“…It is about -130 dBm [15]. This means that the signal power is much lower than noise, and the SNR (Signal-to-Noise Ratio) is minus.…”

Section: Signal Sourcementioning

confidence: 97%

Section: Signal Sourcementioning

confidence: 99%

Section: Quantization Bitsmentioning

confidence: 99%

“…The system can simulate GPS signal, record and replay GPS signal. Reference [15] shows that using USRP to record real GPS signal then using Matlab to decode it.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Practicing a record-and-replay system on USRP

Chen

Zhang

Wang

et al. 2013

Proceedings of the Second Workshop on Software Radio Implementation Forum

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show abstract

“…Universal Software Peripheral Radio (USRP) is hardware to support Software Define Radio (SDR) [12][13] in real-time condition. USRP consists of Field Programmable Gate Array (FPGA), Digital to Analog Converter (DAC) and port I/O [14].This research using NI USRP 2920 because it is affordable teaching and research solution. We can develop many algorithms but only use one device.…”

Section: System Implementationmentioning

confidence: 99%

An Implementation of Error Minimization Data Transmission in OFDM using Modified Convolutional Code

Briantoro

Astawa

Sudarsono

2016

emitter

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This paper presents about error minimization in OFDM system. In conventional system, usually using channel coding such as BCH Code or Convolutional Code. But, performance BCH Code or Convolutional Code is not good in implementation of OFDM System. Error bits of OFDM system without channel coding is 5.77%. Then, we used convolutional code with code rate 1/2, it can reduce error bitsonly up to 3.85%. So, we proposed OFDM system with Modified Convolutional Code. In this implementation, we used Software Define Radio (SDR), namely Universal Software Radio Peripheral (USRP) NI 2920 as the transmitter and receiver. The result of OFDM system using Modified Convolutional Code with code rate is able recover all character received so can decrease until 0% error bit. Increasing performance of Modified Convolutional Code is about 1 dB in BER of 10 -4 from BCH Code and Convolutional Code. So, performance of Modified Convolutional better than BCH Code or Convolutional Code.

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Beidou Software Receiver Based on Intermediate Frequency Signal Collector with INS-Aided

Cheng

Tang

et al. 2016

Intelligent Computing Methodologies

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Software-defined GPS receiver on USRP-platform

Cited by 20 publications

References 4 publications

Practicing a record-and-replay system on USRP

Practicing a record-and-replay system on USRP

An Implementation of Error Minimization Data Transmission in OFDM using Modified Convolutional Code

Beidou Software Receiver Based on Intermediate Frequency Signal Collector with INS-Aided

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