Arrangement for generating an SSB signal
AssigneeU.S. Philips Corporation
InventorsMustafa K. Gurcan, Anne Watteau
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Abstract
An SSB generator in which a digitized analogue signal is processed in accordance with Weaver's method. The baseband I and Q signals are interpolated at a sampling frequency f.sub.s in respective first interpolators (30, 32). The interpolated signals are frequency up-converted to an output SSB carrier frequency Nf.sub.s by applying said signals to respective second interpolators (38, 40) in which the signals are sampled at 4Nf.sub.s. The samples at the outputs of the second interpolators (38, 40) are applied to a multiplexer (42) which provides a digitized version of the SSB signal which is converted to an analogue signal and filtered.
Claims19
An SSB generator comprising means for providing quadrature related digitised first and second input signals at baseband frequencies, interpolating means for frequency up-covering said first and second signals, and multiplexing means coupled to the interpolating means for multiplexing the frequency up-converted first and second input signals to provide a digitised SSB signal having a desired carrier frequency,
- characterized in that the interpolating means comprises first and second interpolating means, the first interpolating means serving to sample respectively the first and second signals at a frequency (f.sub.s) greater than the digitizing frequency and the second interpolating means serving to sample the signals from the first interpolating means at a multiple of the first mentioned sampling frequency, and
- the multiplexing means is arranged to multiplex the samples at the sampling frequency of the second interpolating means.
Dependencies are inferred from the claim text.