8-bit Correlator


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IP ExpressThe function of this core is to correlate an incoming data stream to a stored binary pattern called a code sequence or coefficient sequence. The data stream may be binary or multi-valued, either signed or unsigned, and is provided to the core one sample at a time. The core can be configured to perform either a real correlation with a single data input stream and a single coefficient sequence, or a complex correlation with two input data streams representing the real and imaginary input terms, and two coefficient sequences representing the real and imaginary coefficients. The core provides multiple channel capability and can support up to 256 channels. Correlations for each channel operate independently from each other. Also, up to 256 different coefficient sequences may be stored in the core, and each channel can select which coefficient sequence is correlated to that channel, so one coefficient sequence could be used for all 256 channels if desired.

Features

  • Supports 1 to 8 bit input data width
  • Supports 1 to 256 channels
  • Supports a correlation window from 8 to 2048 taps
  • Supports oversampled input data from 2x to 8x
  • Supports real correlations for either signed or unsigned data
  • Supports complex correlations for signed data
  • Allows the user to tune the performance of the design by specifying the values of several parameters
  • Provides a selectable input FIFO for maximum data throughput
  • Allows the user to specify the number of coefficient sequences desired, from 1 to 256

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Block Diagram

Correlator IP Core

Performance and Size

Results for LatticeECP/EC1
IPexpress User-Configurable Mode SLICEs LUTs Registers SysMEM EBRs Fmax (MHz)
DWIDTH=4, NUM_TAP=16, MWIDTH=4, NUM_CHAN=2 197 158 291 5 262
DWIDTH=8, NUM_TAP=32, MWIDTH=8, NUM_CHAN=4 517 457 763 9 196
DWIDTH=8, NUM_TAP=256, MWIDTH=16, NUM_CHAN=2 869 763 1323 17 199

1 Performance and utilization characteristics are generated using LFECP33E-5F484C in Lattice's ispLEVER v7.1 software. When using this IP core in a different density, speed, or grade within the LatticeECP/EC family, performance may vary.

Results for LatticeECP21
IPexpress User-Configurable Mode SLICEs LUTs Registers SysMEM EBRs Fmax (MHz)
DWIDTH=4, NUM_TAP=16, MWIDTH=4, NUM_CHAN=2 205 171 291 5 361
DWIDTH=8, NUM_TAP=32, MWIDTH=8, NUM_CHAN=4 572 476 763 9 246
DWIDTH=8, NUM_TAP=256, MWIDTH=16, NUM_CHAN=2 905 829 1323 17 260

1 Performance and utilization characteristics are generated using LFE2-50E-7F672C in Lattice's ispLEVER v7.1 software. When using this IP core in a different density, speed, or grade within the LatticeECP2 family, performance may vary.

Results for LatticeECP2M1
IPexpress User-Configurable Mode SLICEs LUTs Registers SysMEM EBRs Fmax (MHz)
DWIDTH=4, NUM_TAP=16, MWIDTH=4, NUM_CHAN=2 205 171 291 5 354
DWIDTH=8, NUM_TAP=32, MWIDTH=8, NUM_CHAN=4 527 476 763 9 267
DWIDTH=8, NUM_TAP=256, MWIDTH=16, NUM_CHAN=2 905 821 1323 17 285

1 Performance and utilization characteristics are generated using LFE2-50E-7F672C in Lattice's ispLEVER v7.1 software. When using this IP core in a different density, speed, or grade within the LatticeECP2M family, performance may vary.

Results for LatticeSC/M1
IPexpress User-Configurable Mode SLICEs LUTs Registers SysMEM EBRs Fmax (MHz)
DWIDTH=4, NUM_TAP=16, MWIDTH=4, NUM_CHAN=2 182 155 291 5 375
DWIDTH=8, NUM_TAP=32, MWIDTH=8, NUM_CHAN=4 497 455 763 9 375
DWIDTH=8, NUM_TAP=256, MWIDTH=16, NUM_CHAN=2 836 769 1324 17 360

1 Performance and utilization characteristics are generated using LFSCM3GA25E-7F900C in Lattice's ispLEVER v7.1 software. When using this IP core in a different density, speed, or grade within the LatticeSC/M family, performance may vary.

Results for LatticeXP1
IPexpress User-Configurable Mode SLICEs LUTs Registers SysMEM EBRs Fmax (MHz)
DWIDTH=4, NUM_TAP=16, MWIDTH=4, NUM_CHAN=2 197 158 291 5 223
DWIDTH=8, NUM_TAP=32, MWIDTH=8, NUM_CHAN=4 517 457 763 9 186
DWIDTH=8, NUM_TAP=256, MWIDTH=16, NUM_CHAN=2 869 763 1323 17 184

1 Performance and utilization characteristics are generated using LFXP20E-5F484C in Lattice's ispLEVER v7.1 software. When using this IP core in a different density, speed, or grade within the LatticeXP family, performance may vary.

Results for LatticeXP21
IPexpress User-Configurable Mode SLICEs LUTs Registers SysMEM EBRs Fmax (MHz)
DWIDTH=4, NUM_TAP=16, MWIDTH=4, NUM_CHAN=2 205 171 291 5 301
DWIDTH=8, NUM_TAP=32, MWIDTH=8, NUM_CHAN=42 527 476 763 9 235
DWIDTH=8, NUM_TAP=256, MWIDTH=16, NUM_CHAN=2 905 829 1323 n/a n/a

1 Performance and utilization characteristics are generated using LFXP2-30E-7F484C in Lattice's ispLEVER v7.1 software. When using this IP core in a different density, speed, or grade within the LatticeXP family, performance may vary.

2 There are not enough sysMEM EBRs in this device to support this mode; upcoming LatticeXP2 devices can support this mode.

Ordering Information

  Part Numbers
LatticeECP/EC CORR-8BIT-E2-U2
LatticeECP2 CORR-8BIT-P2-U2
LatticeECP2M CORR-8BIT-PM-U2
LatticeSC CORR-8BIT-SC-U2
LatticeXP CORR-8BIT-XM-U2
LatticeXP2 CORR-8BIT-X2-U2

This core is not available for download through the IP Express tool within Lattice Software Design Tools. For further information on how to get this IP Core, please contact your local Lattice sales office.

Documentation

Quick Reference
Downloads
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Correlator IP Core Data Sheet
4/1/2005 PDF 301.2 KB
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Correlator IP User Guide
IPUG38 2/1/2007 PDF 401.3 KB
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Evaluation Package for Correlator IP Core for LatticeECP/EC - Configuration 1
4/12/2005 ZIP 837.7 KB

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