fundamentals of wireless communication solution

... hugemongous. 46 EE 290S: Fundamentals of Wireless Communication Course Notes U.C. Berkeley Fall 2002 Instructor: David Tse Co-written with: Pramod Viswanath September 18, 2002 fades of the channel (i.e. ... 1000 (30 dB). Stupendous amounts of power would be required for more reliable communication. Before we explore further the root cause of the poor performance of this detector, we note that there ... gain, there is a law of diminishing marginal return: as L increases, the marginal benefit decreases because of the law of large numbers, eventually converging to the performance of the AWGN channel....

Ngày tải lên: 20/10/2013, 07:15

... Tradeoff 2: The Wireless Channel Fundamentals of Wireless Communication, Tse&Viswanath Fundamentals of Wireless Communication David Tse 23 2: The Wireless Channel Fundamentals of Wireless Communication, ... Wireless Channel Fundamentals of Wireless Communication, Tse&Viswanath 2: The Wireless Channel Fundamentals of Wireless Communication, Tse&Viswanath 2. The Wireless Channel 7 2: The Wireless ... multipaths up to delays of 1/W . 2: The Wireless Channel Fundamentals of Wireless Communication, Tse&Viswanath 1. Introduction 10 2: The Wireless Channel Fundamentals of Wireless Communication, Tse&Viswanath Wireless...

Ngày tải lên: 11/07/2014, 21:20

... Hz. • Primary driver behind wireless communication system design. Fundamentals of Wireless Communication David Tse Dept of EECS U.C. Berkeley Main story • Communication over a flat fading ... distance of the order of the carrier wavelength. This is 0.3 m for Ghz cellular. • For vehicular speeds, this translates to channel variation of the order of 100 Hz. • Primary driver behind wireless ... fading • Wireless communication typically happens at very high carrier frequency. (eg. f c = 900 MHz or 1.9 GHz for cellular) • Multipath fading due to constructive and destructive interference of...

Ngày tải lên: 11/07/2014, 21:20

Ngày tải lên: 24/08/2014, 17:20

... president of the National Academy of Sciences. The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding ... development of models of several heights for men, women, and chil- dren of various ages for use in the characterization of SAR distributions for exposures characteristic of cell phones, wireless ... development of models of several heights for men, women, and children of various ages for use in the characterization of SAR distributions for exposures characteristic of cell phones, wireless...

Ngày tải lên: 15/03/2014, 15:20

Ngày tải lên: 26/10/2014, 14:15

... xxiii About the Authors xxvii Part I Overview of WiMAX 1 Chapter 1 Introduction to Broadband Wireless 3 1.1 Evolution of Broadband Wireless 5 1.1.1 Narrowband Wireless Local-Loop Systems 5 1.1.2 First-Generation ... Professor Robert Heath and Mr. Runhua Chen from the University of Texas at Austin. Both Professor Heath and Mr. Chen possess an incredi- ble degree of intuition and understanding in the area of ... comprehensive treatment of WiMAX. It should be of great interest. —Dr. Reinaldo Valenzuela, Director of Wireless Research, Bell Labs Fundamentals of WiMAX is a comprehensive guide to WiMAX from...

Ngày tải lên: 27/04/2013, 08:58

... by a shear stress of 10 Pa due to the viscosity of the fluid. Assuming that the velocity gradient of the fluid is constant, determine the coefficient of viscosity of the fluid. Solution: Shear ... volumetric contraction of -2.5%, which means it expands during solidification. Express your answer in terms of millimeters of elongation per meter of length compared to a standard rule. Solution: For ... volume of casting, and A = surface area of casting. 10.16 Identify the three sources of contraction in a metal casting after pouring. Answer. The three contractions occur due to: (1) contraction of...

Ngày tải lên: 27/06/2014, 06:20

Ngày tải lên: 27/06/2014, 08:20

Ngày tải lên: 27/06/2014, 17:20

Ngày tải lên: 27/06/2014, 17:20

... dark because of the costs of compliance. The costs to comply with Sarbox can be several million dollars, which can be a large percentage of a small firms profits. A major cost of going dark ... this: “A firm has estimated that the cost of improving the safety of one of its products is $30 million. However, the firm believes that improving the safety of the product will only save $20 million ... costs of raising funds in the public market. 5. The treasurer’s office and the controller’s office are the two primary organizational groups that report directly to the chief financial officer....

Ngày tải lên: 01/07/2014, 14:22

... Dimensions, thermal conductivity and surface temperatures of a concrete slab. Efficiency of gas furnace and cost of natural gas. FIND: Daily cost of heat loss. SCHEMATIC: ASSUMPTIONS: ... if the thickness of the glass were doubled to match that of the air space. The principal advantage of the double pane construction resides with the low thermal conductivity of air (~ 60 times ... emissivity and temperature of a surface placed in a large, evacuated chamber of prescribed temperature. FIND: (a) Rate of surface radiation emission, (b) Net rate of radiation exchange between surface...

Ngày tải lên: 08/08/2014, 17:20

... and thermal conductivity of steel tubes. Temperature of steam flowing through the tubes. Thermal conductivity of insulation and emissivity of aluminum sheath. Temperature of ambient air and surroundings. ... C. = < COMMENTS: Use of the critical insulation thickness in lieu of a thin coating has the effect of reducing the maximum insulation temperature from 778.7 ° C to 318.2 ° C. Use of the critical insulation thickness ... r in,o up to a value of 13 mm (t = 12 mm). COMMENTS: The contact resistance affects the temperature of the wire, and for g,max qE ′′ = 4.51W / m, = the outer surface temperature of the wire is T w,o ...

Ngày tải lên: 08/08/2014, 17:20

... as well as the rate of heat transfer by convection to the surface. COMMENTS: (1) Using the matrix-inversion method, the exact solution to the system of equations (1, 2, 3) of part (a) is T 1 ... guesses. (2) Note that the rate of heat transfer by convection to the top surface of the rod must balance the rate of heat transfer by conduction to the sides and bottom of the rod. NOTE TO INSTRUCTOR: ... m5,9. +−== (2) The system of 9 finite-difference equations is first written in the form of Eqs. (1) or (2) and then written in explicit form for use with the Gauss-Seidel iteration method of solution; see...

Ngày tải lên: 08/08/2014, 17:20

... steady-state temperature. (2) Both the FEHT and IHT methods of solution give identical results. Their steady-state solutions agree with the result of an energy balance on a time interval basis yielding ... form of the FDEs for the interior nodes. Use space and time increments of 37.5 mm and 1.2 s, respectively, for a 17-node network. For the surface node 00, use the FDE derived in Section 2 of the ... exact analytical solution. This difference represents an error of -1% ( -1 ° C / (120 – 20 ) ° C x 100). At the x = 150 mm location, the difference is about -0.4 ° C, representing an error of –1.5%....

Ngày tải lên: 08/08/2014, 17:20

... and emissivity of Nichrome wire. Electrical current. Temperature of air flow and surroundings. Velocity of air flow. (a) Surface and centerline temperatures of the wire, (b) Effect of flow velocity ... and thermal conductivity of steel pipe. Temperature of water flow in pipe. Temperature and velocity of air in cross flow over pipe. Cost of producing hot water. (a) Cost of daily heat loss from ... Time to come within 10 ° C of steady-state temperature, (c) Variation of power dissipation required to maintain a fixed heater temperature of 275 ° C over a range of velocities. Uniform heater...

Ngày tải lên: 08/08/2014, 17:20

... conductivity of steel pipe. Temperature and velocity of water flow in pipe. Temperature and velocity of air in cross flow over pipe. Cost of producing hot water. FIND: Daily cost of heat loss ... length. Pressure of saturated steam. FIND: Outlet temperature and pressure of air. Mass rate of steam condensation. SCHEMATIC: ASSUMPTIONS: (1) Steady-state, (2) Outer surface of annulus is adiabatic, ... the initial estimate of 325 K is reasonable and iteration is not necessary. (2) For a steam flow rate of 0.01 kg/s, approximately 10% of the outflow would be in the form of saturated liquid,...

Ngày tải lên: 08/08/2014, 17:20

... room, per unit length of the tube; effect on quality, x, at outlet of 30 m length of tube; (b) Effect of radiation on heat transfer and quality of outlet flow; (c) Effect of emissivity and insulation ... 9.72 KNOWN: Velocity and temperature of air flowing through a duct of prescribed diameter. Temperature of duct surroundings. Thickness, thermal conductivity and emissivity of applied insulation. FIND: ... Analytical solution using average fin surface temperature of s T 125 C = to estimate the free convection and linearized radiation coefficients; comment on sensitivity of fin heat rate to choice of s T ; ...

Ngày tải lên: 08/08/2014, 17:20