PE license and exams
The PE exam tests your ability to practice competently in a particular engineering discipline. It is designed for engineers who have gained...
Jumat, 21 Januari 2011
Fundamental WiMAX Concepts
WiMAX has four fundamental architectural components: Base Station (BS) : The BS is the node that logically connects wireless subsc...
Rabu, 19 Januari 2011
Turbo Code Applications 2
Terrestrial telephony: Turbo codes are suited for down-to-earth applications such as terrestrial telephony. Satellite technology pro...
Turbo Code Applications 1
Mobile radio: Few environments require more immunity to fading than those found in mobile communications. For applications where...
Motorola i886
The Motorola i886 is a very solid candybar phone coated in soft touch paint for a quality feel. It has a 2.2” QVGA display with 262K co...
Samsung C3530
Smartphones and big screen sizes are all the rage nowadays and even though they offer great functionality, there is still the casual u...
Nokia C3 Touch
This is a global GSM phone. It can be used with T-Mobile USA and AT&T . The design of the Nokia C3 Touch and Type borrows heav...
Selasa, 18 Januari 2011
Introduction to 802.11 Standard
IEEE 802.11 standard specifies a 2.4 GHz operating frequency with data rates of 1 and 2 Mbps using either Direct Sequence Spread Spectr...
Minggu, 16 Januari 2011
Basic commands and syntax in MATLAB
We will speak about Basic commands and syntax in MATLAB to show how we can write code in it . If you type in a valid expression and ...
Intro to MATLAB
MATLAB is a software package for computation in engineering, science, and applied mathematics. It offers a powerful programming languag...
Rabu, 12 Januari 2011
Intro to UMTS
UMTS (Universal Mobile Telecommunications Service) is a third-generation (3G) broadband, packet-based transmission of text, digitized...
What's OFDM-MIMO ?
Multiple Input Multiple Output (MIMO) One building block for next-generation wireless access, MIMO (multiple-input, multiple-output),...
OFDM Advantages and Disadvantages
The major advantage of OFDM is its robustness against multi path propagation. Thus, it is suitable to be implemented in wireless environ...
Orthogonal Frequency Division Multiplexing (OFDM)
O rthogonal F requency D ivision M ultiplexing ( OFDM ) is a multicarrier modulation technique. OFDM provides high bandwidth efficienc...
Selasa, 11 Januari 2011
Using SC-FDMA in LTE
Single carrier frequency division multiple access (SC-FDMA) has been adopted by the third generation partnership project (3GPP) for u...
Minggu, 09 Januari 2011
Turbo-Decoder
The turbo code decoder is an iterative Maximum A posteriori (MAP) algorithm. MAP algorithms use a Bayesian analysis of the channel t...
Turbo-Encoder
Turbo code encoders are a concatenation of systematic encoders referred to as constituent codes. (Systematic encoders pass both uncod...
What's the Turbo-code ?
Turbo coding is a forward error correction (FEC) scheme. Iterative decoding is the key feature of turbo codes. Turbo codes consist...
Senin, 03 Januari 2011
Frequency Concepts in GSM
An MS communicates with a BTS by transmitting or receiving radio waves, which consist of electromagnetic energy. The frequency of a ra...
Messages in CDMA
I want to speak about messages in CDMA , how it sent and what the call processing ** In CDMA, most call processing events are driven by me...
Minggu, 02 Januari 2011
Adv. & DisAdv. of GSM and IS-95
Advantages of 2G GSM GSM is mature; this maturity means a more stable network with robust features. Less signal deterioration inside buildin...
Sabtu, 01 Januari 2011
An intro to WiMAX
WiMAX ( W orldwide I nteroperability for M icrowave A ccess) ( 802.16 - 802.16e ) It was defined by the WiMAX Forum is a telecommuni...
Secret codes for Samsung
*#1111# -------> S/W Version *#1234# -------> Firmware Version *#2222# -------> H/W Ve...
GSM NETWORK COMPONENTS
The GSM network is divided into two systems. Each of these systems are comprised of a number of functional units which are individual com...
GSM PHASES
In the late 1980s, the groups involved in developing the GSM standard realized that within the given time-frame they could not complete ...
Basics of Optical Fibers
A fiber-optic system is similar to the copper wire system that fiber-optics is replacing. The difference is that fiber-optics use light...
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