Signal processing arrangement and signal processing method

1. A signal processing device for a radio locking system to process at least one of a digitized phase-modulated and digitized spread input signal including a complex channelizer configured to perform at least one of despreading and demodulating the input signal in the time domain using a convolution operation, the complex channelizer comprising:

a sampler configured to receive the digitized input signal and sample the received digitized input signal during a defined time period;

a first window function configured to weight the input signal samples using a first multiplier;

a buffer storage downstream of the first window function and configured to buffer the weighted input signal samples;

a multiplication function configured to receive the weighted input signal samples from the buffer storage and apply a second multiplier to shift the frequency of the input signal samples to baseband; and

a low-pass filter downstream of the multiplier and configured to receive the baseband signals, distinguish the signals into different frequency subranges, and filter out one or more of the distinguished subranges;

wherein the filter implements a convolution with a filter impulse response.

2. The signal processing device according to claim 1 , wherein the complex channelizer is configured to despread and demodulate the input signal simultaneously.

3. The signal processing device according to claim 1 , wherein the multiplier multiplies the input signal by e j2πft , and the filter filters a product provided by the multiplier using a filter transfer function h(t), wherein f represents the frequency and t represents the time.

4. The signal processing device according to claim 1 , in which the input signal is BPSK-modulated and the channelizer performs BPSK-demodulation the input signal.

5. The signal processing device according to claim 1 , in which the input signal is DSSS- or CMDA-spread and the channelizer performs DSSS- or CMDA-despreading on the input signal.

6. The signal processing device according to claim 1 , further comprising:

at least one further channelizer, connected in parallel with the one channelizer, having a different center frequency, which produces a multiplicity of output signals, and

a selection device which selects at least one output signal from the multiplicity of the output signals.

7. The signal processing device according to claim 6 , in which the selection device has a maximum-likelihood decision-maker.

8. The signal processing device according to claim 6 , in which the selected channel has a phase estimation device which performs phase estimation for the input signal using at least one of the output signals.

9. The signal processing device according to claim 8 , in which the selected channel has a frequency estimation device which performs frequency estimation for the input signal using at least two phase estimations for the output signals.

10. A signal processing method comprising:

receiving an input signal including at least one of digitized phase-modulated and digitized spread signals,

sampling the received digitized input signal during a defined time period;

weighting the input signal samples using a first multiplier;

buffering the weighted input signal samples in a buffer storage;

receiving the weighted input signal samples form the buffer storage and applying a second multiplier to shift the frequency of the input signal to baseband; and

filtering the baseband signals to distinguish the signals into different frequency subranges and filter out one or more of the distinguished subranges, using a convolution with a filter impulse response;

thereby at least one of despreading and demodulating the input signal in the time domain.

11. The method according to claim 10 , wherein the input signal are despread and demodulated simultaneously.

12. The method according to claim 10 , in which the input signal is multiplied by e j2πft , and the resultant product is filtered using a filter transfer function h(t), wherein f represents the frequency and t represents the time.

13. The method according to claim 10 , in which the input signals are BPSK-modulated and BPSK-demodulation is performed on the input signals.

14. The method according to claim 10 , in which the input signals are DSSS- or CDMA spread and DSSS- or CDMA-despreading is performed on the input signals.

15. The method according to claim 10 , in which, at different center frequencies, complex channalizers are used to take convolution operations as a basis for at least one of despreading and demodulating the input signals in the time domain, wherein a multiplicity of output signals are produced, and in which one output signal is selected from the multiplicity of the output signals.

16. The method according to claim 15 , in which the selection is made on the basis of a maximum-likelihood decision.

17. The method according to claim 15 , in which phase estimation for the input signal is performed using at least one of the output signals.

18. The method according to claim 17 , in which frequency estimation for the input signal is performed using at least two phase estimations.