| Application Needs

  . Acquire the radio signals in outfield environment for detailed analysis in the lab;

  . Collect the radio signals in working environment to freely reconstruct the real radio background;

  . Record the radio signal changes during the test process to provide objective basis for the equipment performance evaluation;

  . Acquire specific signals to be used as signal simulator.

| Solution

KSW-VST vector signal transceiver integrates the wideband VSG and wideband VSA, and has high-speed data transmission interface and extendable deep storage space. It can be widely used in many application scenarios including signal acquisition, storage, analysis and generation, covering such fields as R&D and verification of RF microwave chip, mass production testing, and base station terminal testing. Also, it can be used in RF spectrum monitoring and sampling, signal and spectrum resource analysis, signal generation and interference release, etc. The storage is extendable to meet long-term continuous recording and playback needs.

1. Open space signal recording

When applied in open space, the vector signal transceiver is equipped with antenna of corresponding frequency band, to realize radio signal monitoring, acquisition and recording. The playback function allows RF playback of the acquired and recorded signals, which can be used for radio scene reconstruction, laboratory signal research and analysis, etc.

2. Signal recording in simulation test process

When conducting simulation tests in the laboratory, the vector signal transceiver is connected to the test network to enable signal recording during the test and provide data support for the performance evaluation of the equipment under test.  The vector signal transceiver has a signal generation function that enables it to generate general modulated signals and play back stored signals. It can be used to provide background signals, interference signals or specific signals when building a communication equipment test system.

The vector signal transceiver provides a common function of vector signal analysis, which can complete measurement of parameters such as EVM, constellation diagram, phase error, amplitude error, quadrature distortion, carrier feed-through, gain imbalance, signal-to-noise ratio, carrier frequency error, and carrier amplitude.

| Challenges

  . Realizing wideband signal transceiving in a single instrument space

Integrate wideband transmitter and receiver in a limited space, with frequency range covering 1MHz-40GHz and maximum signal transient bandwidth reaching 1GHz;

  . Influence of abundant OTA signals on wideband transceiver performance

Adopt antenna to receive open space signals, which are of large signal quantity, rich variety and wide distribution frequency, putting high demands on the frequency selectivity of wideband receivers;

  . Long-term continuous recording of wideband signal data

Continuously acquire and store signals with the bandwidth of 1GHz and above. According to the minimum 2GHz sampling rate and 12bits bit width, the continuous data read/write throughput calculated reaches more than 3GB/S. Taking 1 hour of acquisition as an example, a 10.8TB storage space is required, which poses great challenges to the capacity and continuous read/write rate of the storage system.

| Functional Highlights

² Realize transmitting and receiving of wideband RF signals via single equipment

u Transmitting frequency range:

1.5MHz-6GHz/1.5MHz-20GHz/1.5MHz-40GHz

u Receiving frequency range:

1.5MHz-6GHz/1.5MHz-20GHz/1.5MHz-40GHz

u Maximum instantaneous signal bandwidth: 1GHz

² Continuously record and play back wideband signals

u Continuous storage read/write speed: ≥3.6GB/S

u Storage capacity: 6TB, extendable

² Obtain and import signal files through the high-speed data transmission interface

u 10G Ethernet

u Customized high-speed data transmission protocol

² Realize online and offline signal analysis and recognition

u Recognizable modulation signal types: AM, FM, BPSK, QPSK, 8PSK, 8QAM, 16QAM, etc.;

u Modulation recognition accuracy: ≥90% (BPSK: C/N≥5dB, QPSK: C/N≥6dB, OQPSK: C/N≥5dB, π/4QPSK: C/N≥6dB, 8PSK: C/N≥12dB, 16QAM: C/N≥12dB)

u Carrier frequency measurement precision: Better than 1x10-4 of symbol rate (C/N ≥ 10dB, typical signal bandwidth not less than 100KHz)

u Symbol rate measurement accuracy: Better than 1x10-4 of symbol rate (C/N ≥ 10dB, typical signal bandwidth not less than 100KHz)

² Generate general radio signals

u Signal generation method: Arbitrary waveform generation, real-time generation

u Real-time modulation generation methods: SSB, AM, FM, ASK, 2FSK, 4FSK, 8FSK, MSK, GMSK, BPSK, QPSK, 8PSK, 16QAM, 64QAM, etc.

u Frequency hopping rate: 100000 hop/s @ within maximum bandwidth

² Generate interference signals

u Interference method: Blocking interference, targeting interference, tracking interference, forwarding interference and smart interference

u Interference pattern: Single carrier, noise, comb spectrum, pseudo-code modulation, frequency hopping interference and frequency sweeping interference

² Provide multiple configuration options, including transceiving channel frequency, number, power, dynamic range, storage depth, etc.