Implementation Problems in Hadamard Transform Spectrometry

Ruth A. Dyer, Stephen A. Dyer, Brian K. Harms, Timouthy W. Johnson, Jin Bae Park

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The multiplex advantage offered by Hadamard transform spectrometry (HTS) can improve the signal-to-noise ratio (SNR) at the output of a spectrometer. However, additional processing of the spectrometer output is required to recover the individual spectral components. A block diagram description of HTS and the spectrum-recovery process is presented. A computer simulation of this model has been developed and can be used to examine the effects of certain nonidealities that may typically be encountered. Traditionally, the inverse Hadamard transform (IHT) has been used as the spectrum-recovery method, but the IHT does not take into account the nonidealities associated with the multiplexing process. Two spectrum-recovery methods that address the problems of nonidealities are presented. The relative performance of all three methods is compared with regard to mean-square error (MSE) and to the computational efficiency of the algorithms necessary to implement the schemes. An example application is described and the performance of the three spectrum-recovery schemes is discussed.

Original languageEnglish
Pages (from-to)163-167
Number of pages5
JournalIEEE Transactions on Instrumentation and Measurement
Issue number1
Publication statusPublished - 1990 Feb

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering


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