1. For radio transmission in free space, signal power is reduced in proportion to the square of the distance from the source, where as in wire

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1. For radio transmission in gratuitous boundlessness, illustrious ability is feeble in adjustment to the clear ofthe removal from the spring, where as in wire transmission, the wasting is a unrovingestimate of dB per kilometer. The forthcoming consideration is used to loveness the dB diminution not-absolute tosome regard for gratuitous boundlessness radio and symmetrical wire. Fill in the mislaying entirety tofinished the consideration.2 . What is the discord among QPSK and offset QPSK?3. A mitigated NRZ enactment unconcealed as enhanced-NRZ (E-NRZ) is sometimes used for highdensity magnetic tape recording. E-NRZ encoding entails separating the NRZ-L postulates course into7-bit terms; inverting bits 2,3, 6,and 7; and adding one equality bit to each term. The equality bit ischosen to find the entirety estimate of 1s in the 8-bit term an odd compute. What are the advantages ofE-NRZ aggravate NRZ-L? Any disadvantages?4.5.6 For the bit course 01001110, draw the waveforms for each of the enactments of consideration 5.2. Assume that the illustrious equalize for the precedent bit for NRZI was high; the most fresh precedent 1 bit (AMI) has a denying voltage; and the most fresh preceeding 0 bit (pseudoternary) has a denying voltage.5. the vote illustrious must be used to modulate a conspicuous (carrier) sum for which the naturalantenna extent is smaller/a. What is the protraction of an antenna one-half waveprotraction covet for sending radio at 300Hz?b. An opinion is to use a harmonization contrivance for transmitting the vote illustrious bymodulating a consigner sum, so that the bandwidth of the illustrious is a niggardly bandcentered on the consigner sum. Suppose we would love a half-wave antenna tohave a protraction of 1 m. What consigner sum would we use?6. For radio transmission in gratuitous boundlessness, illustrious ability is feeble in adjustment to the clear of the removal from the spring, where as in wire transmission, the wasting is a unroving estimate of dB per kilometer. The forthcoming consideration is used to loveness the dB diminution not-absolute to some regard for gratuitous boundlessness radio and symmetrical wire. Fill in the mislaying entirety to finished the consideration.7. Suppose a ray of distinguishable gentle passes from the air into soak at an propensity to the level of 30o. What is the propensity of the ray in the soak? Note: At exemplar elysian conditions at the earth's deportment, a unexcited rate for the refractive abjuration is 1.0003. customary rate of refractive abjuration is 4/3

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