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The Fourier slice theorem, which was widely used in microwave radar imaging, is modified to be compatible in the spatial domain. Compared with the previous scheme, interpolation is not requisite for this spatial slice theorem. Numerical simulation for simple test targets is presented and its validity is discussed.

[1] This paper proposes an efficient and comprehensive algorithm for computing the protection ratio and illustrates some results applicable to the initial planning of frequency coordination for fixed wireless networks. A net filter discrimination depending upon transmitter spectrum mask and overall receiver filter characteristic is also examined to see the effect of adjacent channel interferences. Numerical simulations for cochannel and adjacent channel protection ratios are performed for the 6.2 GHz frequency band, including transmitter spectrum mask and receiver filter response. According to results for 64-QAM (quadrature amplitude modulation) and 60 km at bit error ratio 10 À6 , fade margin and cochannel protection ratio are 41.1 and 74.9 dB, respectively. In addition, it is shown that the net filter discrimination for 30 MHz channel bandwidth provides 26.5 dB at the first adjacent channel, which yields adjacent channel protection ratio of 48.4 dB. The proposed method gives an easy and systematic method to compute the protection ratio and can be applied to frequency coordination in fixed wireless networks up to the millimeter wave band.Citation: Suh, K. W. (2007), A generalized formulation of the protection ratio applicable to frequency coordination in digital radio relay networks, Radio Sci., 42, RS1007,

The effect of timing jitter is evaluated using an improved Gaussian approximation for an optically preamplified PPM receiver. For the parameters considered a potential sensitivity of 23.6 photons/bit is demonstrated in the unjittered case with the jittered optimum at worst only 1 dB less sensitive. Both these results surpass the fundamental sensitivity limit of an OOK NRZ system. The analysis predicts that wrong-slot and jitter errors first become dominant at a coding level higher than that suggested by an earlier model. 0 ABSTRACT This article presents an efficient model for the prediction of cross-talk effects on generator wires and on both the near and far ends ofreceptor wires of multiconductor transmission lines. The parameter of interest is the average power output of the generator wire, where all effects of multiconductor transmission-line parameters are included and the cross talk on the receptor wire is also estimated. This model was used in a printed circuit board (PCB) with microstbp lines, and good agreement between theoly and measurements was obtained. 0 1995 John Wiley & Sons, h e .

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