31 OPTIMIZATION PROBLEMS AND MODELS FOR PLANNING CELLULAR NETWORKS

... all 31 OPTIMIZATION PROBLEMS AND MODELS FOR PLANNING CELLULAR NETWORKS Edoardo Amaldi 1 , Antonio Capone 1 , Federico Malucelli 1 , and Carlo Mannino 2 1 Dipartimento di Elettronica e Informazione Politecnico ... A. Capone, and F. Malucelli. Radio planning and coverage optimization of 3G cellular networks. Wireless Networks, 2005c. Submitted for publication....

Ngày tải lên: 08/07/2014, 16:56

... NGOs and enterprises financed with foreign capital. VBLI offers consulting services and training programs that will improve the labor environment at small and medium – size shoe manufacturers and ... knowledge about the importance of CSR and some of them even do not know the benefits that CSR can bring to 8 4.5.2. Some theoretical problems and demand for changing 54 5....

Ngày tải lên: 13/03/2014, 14:20

... Rate 10 kb/s (only for control) Modulation FM for speech, FSK for data Frequency Deviation 12 kHz for speech and 8 kHz for data User Data Transfer Capability None Table 1-1 The cellular system features ... TDMA for Digital European Cordless Telephone [DECT] and wideband CDMA [W-CDMA]). The standards developed for PCS in North America appear in References [15]–[19]. 15 Int...

Ngày tải lên: 02/03/2013, 16:58

... look and feel of the configuration files and command-line interfaces for Cisco routers is also shown in this chapter. The chapter ends with the configuration of a Cisco router for global and interface ... call itself was often long distance. Demand could quickly drive down the price for the hardware, but what could drive the demand for modems and computers, and routers? The...

Ngày tải lên: 06/11/2013, 00:15

... Rate 10 kb/s (only for control) Modulation FM for speech, FSK for data Frequency Deviation 12 kHz for speech and 8 kHz for data User Data Transfer Capability None Table 1-1 The cellular system features special ... America, and now the United States. GSM, like IS-54 and IS-136, combines FDMA and TDMA access schemes and uses 2 frequency bands around 900 MHz [7]. As shown i...

Ngày tải lên: 23/12/2013, 01:17

... standard IS-54, its newer version IS-136, and Global System for Mobile Communica- tions (GSM), are all based on TDMA and FDD. In IS-54 and IS-136, each voice channel has a bandwidth of 30 kHz and ... six time slots. For full-rate speech, three users use these six slots in a certain way. For example, user 1 uses time slots 1 and 4, user 2 time slots 2 and 5, and user 3 time...

Ngày tải lên: 18/06/2014, 10:05

... However, standards currently specify N ϭ 1 and 3 only. Subsequences (shown as A 1 , A 2 , . . .) are multiplexed with the power control bits, converted into a parallel form, and then split into I and ... is a sequence of k information bits for which the receiver performance is optimum, then that sequence will be the first k information bits of a sequence that optimize the performance...

Ngày tải lên: 18/06/2014, 10:05

... stations in the serving area and thus may be probable candidates for a handoff. ■ Remaining set Pilots outside of the previous three sets form the remaining set. The handoff procedure is briefly ... as cdmaOne, are based upon IS-95 standards [6], [7]. The spectrum allo- cation is shown in Figure 4-1. The allocation is 50 MHz for cellular systems and 120 MHz for Personal Communicat...

Ngày tải lên: 18/06/2014, 10:05

... similar to the forward fundamental channel. It supports a data rate of 9.6 kb/s and its subrates (4.8, 2.7, and 1.5 kb/s), or 14.4 kb/s and its subrates (7.2, 3.6, and 1.8 kb/s). For these rates, ... Stack cdma2000 takes the information — user data and signaling — from the higher layers and adds two lower-layer protocols before trans- Chapter 4 140 foreign serving area informs t...

Ngày tải lên: 18/06/2014, 10:05

... frequency bands, sep- arated by a guard band, are used — one for the uplink and the other for the downlink transmission. In TDD, on the other hand, the same frequency band is used for transmissions ... defined on both uplinks and downlinks, are avail- able in both FDD and TDD modes, and carry higher-layer data and control information such as voice, video, handoff orders, and...

Ngày tải lên: 18/06/2014, 10:05