Vendor: Faststream Technologies Category: Filters Transforms

DIGITAL UP CONVERSION (DUC)

An interpolating filter chain, numerically controlled oscillator, and mixer comprise the DUC.

Overview

An interpolating filter chain, numerically controlled oscillator, and mixer comprise the DUC. A lowpass interpolator, halfband interpolator, CIC compensation interpolator, CIC interpolator, and CIC gain correction comprise the filter chain.
Because sample rates are lower at the beginning of the chain, the earlier filters can maximize resource use by sharing multipliers. The CIC compensation interpolator improves the spectral response by accounting for later CIC droop when interpolating by two. For cell search and master information block recovery, LTE receivers typically employ a sampling rate of 1.92 Msps.

Key features

  • 70 MHz IF, 2.5.8, & 22MHz BWs (3dB)
  • 204.8 MHz DAC Sample Rate
  • The modem provides a 25 kHz fine-tune step
  • Receiver / Exciter minimum freq step = 0.5 MHz, settling time < 100 us to 100Hz
  • Basebang samples are converted to 70 MHz “digital IF”
  • Polyphase filter approach reduces required 204.8 Msps processing to the simple data transfer
  • 208.8 Msps DAC sample rate required to reduce DAC sinx/x roll-off
  • The final 2x interpolation process employs parallel FIR filters that process at a 1x rate
  • As a result of the quarter-wave frequency shift, the number of filter taps is reduced by a factor of two
  • Maintain 16 bits in/out of DDC
  • Complex mixer functions should keep 18 bits at the input and truncate to 16 bits at the output
  • DUC share a single DDS FPGA instantiation
  • DUC shares the same FPGA filter structures

Block Diagram

FST-DUC block diagram

Specifications

Identity

Part Number
FST-DUC
Vendor
Faststream Technologies
Type
Silicon IP

Files

Product Sheet Download

Note: some files may require an NDA depending on provider policy.

Provider

Learn more about Filters Transforms IP core

Super Edge Medical SoC (SEMC)

Post Covid 19, the biggest bet for revival of the industry is on 5G proliferation across the world. It is widely expected that 5G’s Enhanced Mobile broadband (eMMB) with speeds as high as 20X of 4G speed, Ultra reliable and Low Latency Communication ( URLLC) and massive Machine type connectivity (mMTC) will transform the world.

Frequently asked questions about Filters and Transforms IP cores

What is DIGITAL UP CONVERSION (DUC)?

DIGITAL UP CONVERSION (DUC) is a Filters Transforms IP core from Faststream Technologies listed on Semi IP Hub.

How should engineers evaluate this Filters Transforms?

Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this Filters Transforms IP.

Can this semiconductor IP be compared with similar products?

Yes. Buyers can compare this product with similar semiconductor IP cores or IP families based on category, provider, process options, and structured technical specifications.

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