Development of a Real-Time Software-Defined GPS Receiver in a LabVIEW-Based Instrumentation Environment

Schmidt, Erick; Akopian, David; Pack, Daniel J.

doi:10.1109/tim.2018.2811446

Cited by 29 publications

(30 citation statements)

References 18 publications

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“…The challenges involved in the interfacing between both devices are addressed. [8] proposed and demonstrated a state-of-the-art GPS receiver based on LabView and C/C++ testbeds. In this work, Ettus USRP B200 with Global Positioning System disciplined oscillator (GPSDO) RF frontend kit is used to capture the GPS L1 signal.…”

Section: Figure 1 Different Categories In Gnss Software Receiversmentioning

confidence: 99%

Development of Custom Interface Driver between USRP and SoC devices for SDR Applications

Kumar¹,

Paidimarry²

2019

IJITEE

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Global Navigation Satellite System (GNSS) is used to provide position based on satellite constellation. The GNSS Software defined radio (SDR) is a software approach which is more flexible than Hardware receivers. In GNSS SDR, most of the RF frontends are interfaced with a host-Personal Computer (PC). The host-PC based GNSS-SDR systems suffer from computational complexity and latency between IQ samples of GNSS signals. There are several RF front ends available to capture the real time signals. Among all these, USRP RF frontends are flexible for the prototype development. Earlier the host-PC was interfaced with the USRP device for the SDR implementation. In this work the, USRP N210 is interfaced with Zynq SoC device for GNSS SDR applications. This approach will introduce parallelism, which in turn leads to reduction in latency between IQ samples. A custom Ethernet driver to interface the USRP N210 with Zynq SoC device is proposed. The experimental results showcase that the proposed SoC based approach is suitable for GNSS-SDR prototype

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Section: Figure 1 Different Categories In Gnss Software Receiversmentioning

confidence: 99%

Development of Custom Interface Driver between USRP and SoC devices for SDR Applications

Kumar¹,

Paidimarry²

2019

IJITEE

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“…As for the proposed SDR GPS L1 receiver, it is LV-based and has real-time capabilities for up to 12 tracking channels. For further details on the implementation of proposed SDR platform specifically on SW and HW architectures as well as its configuration options, the reader is directed to [18], [19].…”

Section: Gps L1 Baseband Modulesmentioning

confidence: 99%

“…This paper provides a proposed minimum mean-squared error (MMSE) interference mitigation technique from [6] which is enhanced for computational feasibility, and implemented on a real-time capable GPS L1 SDR receiver. The GPS SDR receiver SW has been optimized for real-time operation on National Instruments' LabVIEW (LV) platform in conjunction with C/C++ dynamic link libraries (DLL) for improved efficiency as seen in [18], [19].…”

Section: Introductionmentioning

confidence: 99%

A reduced complexity cross-correlation interference mitigation technique on a real-time software-defined radio GPS L1 receiver

Schmidt¹,

Ruble²,

Akopian³

et al. 2018

2018 IEEE/ION Position, Location and Navigation Symposium (PLANS)

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The U.S. global position system (GPS) is one of the existing global navigation satellite systems (GNSS) that provides position and time information for users in civil, commercial and military backgrounds. Because of its reliance on many applications nowadays, it's crucial for GNSS receivers to have robustness to intentional or unintentional interference. Because most commercial GPS receivers are not flexible, software-defined radio emerged as a promising solution for fast prototyping and research on interference mitigation algorithms. This paper provides a proposed minimum mean-squared error (MMSE) interference mitigation technique which is enhanced for computational feasibility and implemented on a real-time capable GPS L1 SDR receiver. The GPS SDR receiver SW has been optimized for real-time operation on National Instruments' LabVIEW (LV) platform in conjunction with C/C++ dynamic link libraries (DLL) for improved efficiency. Performance results of said algorithm with real signals and injected interference are discussed. The proposed SDR receiver gains in terms of BER curves for several interferers are demonstrated.

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“…Software-defined radio (SDR) is a tool that is primarily intended to be used to test and prototype various communication applications such as wireless communications and the Global Navigation Satellite System (GNSS). For example, these include mobile telecommunication [ 1 , 2 ], multi-static multiple-input and multiple-output (MIMO) communication [ 3 , 4 , 5 ], Wi-Fi [ 6 ], characterizing radio-frequency identification (RFID) tags [ 7 , 8 ], prototyping a global positioning systems (GPS) receiver [ 9 , 10 ], locating satellites [ 11 ], and indoor positioning [ 12 ]. The use of SDR is becoming popular because of the fully digital in-phase and quadrature (I/Q) interface, which provides flexibility in signal generation and postprocessing of received signals.…”

Section: Introductionmentioning

confidence: 99%

A Local Oscillator Phase Compensation Technique for Ultra-Wideband Stepped-Frequency Continuous Wave Radar Based on a Low-Cost Software-Defined Radio

Takahashi

Miwa

2021

Sensors

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The paper discusses a way to configure a stepped-frequency continuous wave (SFCW) radar using a low-cost software-defined radio (SDR). The most of high-end SDRs offer multiple transmitter (TX) and receiver (RX) channels, one of which can be used as the reference channel for compensating the initial phases of TX and RX local oscillator (LO) signals. It is same as how commercial vector network analyzers (VNAs) compensate for the LO initial phase. These SDRs can thus acquire phase-coherent in-phase and quadrature (I/Q) data without additional components and an SFCW radar can be easily configured. On the other hand, low-cost SDRs typically have only one transmitter and receiver. Therefore, the LO initial phase has to be compensated and the phases of the received I/Q signals have to be retrieved, preferably without employing an additional receiver and components to retain the system low-cost and simple. The present paper illustrates that the difference between the phases of TX and RX LO signals varies when the LO frequency is changed because of the timing of the commencement of the mixing. The paper then proposes a technique to compensate for the LO initial phases using the internal RF loopback of the transceiver chip and to reconstruct a pulse, which requires two streaming: one for the device under test (DUT) channel and the other for the internal RF loopback channel. The effect of the LO initial phase and the proposed method for the compensation are demonstrated by experiments at a single frequency and sweeping frequency, respectively. The results show that the proposed method can compensate for the LO initial phases and ultra-wideband (UWB) pulses can be reconstructed correctly from the data sampled by a low-cost SDR.

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Development of a Real-Time Software-Defined GPS Receiver in a LabVIEW-Based Instrumentation Environment

Cited by 29 publications

References 18 publications

Development of Custom Interface Driver between USRP and SoC devices for SDR Applications

Development of Custom Interface Driver between USRP and SoC devices for SDR Applications

A reduced complexity cross-correlation interference mitigation technique on a real-time software-defined radio GPS L1 receiver

A Local Oscillator Phase Compensation Technique for Ultra-Wideband Stepped-Frequency Continuous Wave Radar Based on a Low-Cost Software-Defined Radio

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