dsss phy specification for the 2 4ghz band designated for

... of power, the doublesideband phase noise PSD is obtained as SΦ (z) = SΩ (z) = = (2 )2 − z−1 fr2 (2 )2 · − z−1 − z−1 fr2 12 (2 )2 · − z−1 12 fr 2m 2 2m fr (22 ) , where the subscript Φ denotes ... given by 2 ( f ) rad2 /Hz πf (2 )2 ΣΔ = · sin 24 fr fr PN( f )[dBc/Hz] = 10 log πf (2 )2 · sin 24 fr fr 2( m−1) , 2( m−1) (24 ) and its z-domain representation of 2 · Ω(z) = Φ(z) − z−1 , TS (20 ) where ... noise of the WLAN synthesizer was 0.5◦ rms for the lower band and 0.535◦ rms for the upper band and that is close to the predicted phase noise These results are summarized in Table Owing to the accuracy...

Ngày tải lên: 22/06/2014, 22:20

... 16 2. 6 Summary……………… 22 Chapter Reduced size antenna design…………… 23 ii 3.1 Introduction 23 3 .2 Antenna design 27 3 .2. 1 Theoretical design 27 3 .2. 2 Full ... on the resonant frequency and radiation pattern, it affects the impedance bandwidth [22 ] For an antenna with w/h

Ngày tải lên: 30/09/2015, 13:41

... V -5 S 12 dB -10 -15 -20 -25 -30 -35 2. 1 Hình 11: 2. 2 2. 3 2. 4 2. 5 Frequency [GHz] 2. 6 2. 7 2. 8 2. 9 ết mô ph ng S 12 (S21) với có hông có he ch V anten phân cực kép cho access point WLAN 2, 4 GHz ... -40 Frequency [GHz] Hình 6: Hệ số phản xạ S 22 S 12 simulated Measured -5 -10 -15 S 12 dB S 22 dB -10 -20 -25 -30 -35 Frequency [GHz] Hình 7: ộ cách ly S 12 (S21) 101 T p o r n C n Ph n A: Khoa h c Tự ... China, March 22 – 26 , 20 10 Dau-Chyrh Chang, Bing-Hao Zeng, and JiChyun Liu, High Performance Antenna Array with Patch Antenna Elements, PIERS Proceedings, Xi'an, China, March 22 – 26 , 20 10 James,...

Ngày tải lên: 11/03/2014, 02:20

... 400 EMEA 2. 6 GHz FDD 26 20 26 90 25 00 25 70 120 China TDD 2. 6 GHz TDD 25 70 26 20 NAR TDD 2. 5 GHz TDD 24 96 26 90 … … … … … … … EMEA: Châu Âu NAR: Bắc Mỹ … Tham khảo: http://niviuk.free.fr/lte _band. php ... -35 -40 2. 3 2. 4 2. 5 2. 6 2. 7 2. 8 2. 9 Freq [GHz] Hình 4: Hệ số tổn hao ngược S11 24 00 MHz 26 90 MHz VSWR BW = 4 42 MHz 2. 3 2. 4 2. 5 2. 6 2. 7 2. 8 Hình 5: Tỷ số điện áp sóng đứng VSWR 17 2. 9 Thông số quan ... dải 24 00 MHz  26 90 MHz Những kết chứng tỏ anten đề xuất đáp ứng đủ yêu cầu mặt băng thông cho hệ thống WLAN & LTE 16 24 00 MHz 26 90 MHz -5 -10 S11(dB) -15 BW = 4 42 MHz -20 -25 -30 -35 -40 2. 3 2. 4...

Ngày tải lên: 19/03/2015, 23:11

... (1-39) dẫn nạp khe là: % % % Y2 = G2 + jB2 = G1 + jB1 Hay: % G2 = G1 % B2 = B1 SVTH: Từ Lương Phan Nguyễn – Phạm Duy Bình 29 Vì dẫn nạp vào cộng hưởng % Yin = Y1 + Y2 = 2G1 Khi dẫn nạp vào tổng số ... D0 (1-81) () (1- 82) + g 12 g =1 DAF = 12 2 + g 12 với D0 = độ định hướng khe đơn DAF = độ định hướng hệ số AF g 12 = điện dẫn tương đối chuẩn hóa = G 12/ G1 Ta có giá trị tiệm cận D2 thay đổi sau SVTH: ... (1- 72) Eθ = − j Eφ =  j ( X +Y ) k0 hLe E0e − jk0 r  sin X cos Y e Y cos φ 2  2 r X Y − (π / 2)   k0 hLe E0e − jk0r 2 r   j ( X +Y ) sin X cos Y e Y cos θ sin φ 2 X Y − (π / 2) ...

Ngày tải lên: 01/09/2015, 13:58

... 8RL = VA (2. 19) 8RA Công suất tiêu hao dạng nhiệt anten: Pl = - V A Rl (2. 20) R A2 Công suất tán xạ: Pr = - V A Rr (2. 21) R A2 Công suất thu tổng: PC = VA 4(Rr + Rl ) = VA 4RA (2. 22) Khi có phối ... sóng dọc theo chiều dài khác theo chiều rộng patch 32 Hình 2. 24-Mặt anten Trong hình 2. 24, anten vi dải ñược ñại diện khe, ñược tách ñường truyền chiều dài L ñược mở tuyến cạnh cuối Dọc theo chiều ... vi dải theo công thức: c W= (2. 27) εr +1 f0 Tính toán số ñiện môi hiệu dụng ε reff = ε r +1 ε r −1 + h 1 + 12  W  −1 / (2. 28) Tính toán chiều dài hiệu dụng Leff = c f ε reff (2. 29) Tính...

Ngày tải lên: 15/12/2015, 20:02

Ngày tải lên: 13/11/2014, 15:42

... lakes in the north-east of Poland from the- (of) The wind is coming from the west to the- (of) Oxford is to the north-toest of London towards the- Towards the north the woods turn into pine forests ... distributor for these Russian goods to the world market • PREP through althe - You can get the book through your local distributor I - for the exclusive distributor for these goods a distributor for the ... • PREP at the - There's someone at the door in the - He stood in the door for several minutes before deciding whether he'd stay through the - He looked through the door to make sure the children...

Ngày tải lên: 19/08/2013, 09:53

... remove the power cord from the back of the switch or unplug it Then plug it back in If the VLAN information was successfully deleted in Step 2, go to Step and restart the switch using the reload ... Note: The output is different depending on if the IOS used is version 12. 0 or version 12. 1 Once the steps are complete, log off by typing exit, and turn all the devices off Then remove and store the ... Instructions are provided for the 29 00, 29 50, and 1900 Series switches 29 00 and 29 50 Series Switches Enter into the privileged EXEC mode by typing enable If prompted for a password, enter class...

Ngày tải lên: 05/11/2013, 12:15

... lakes in the north-east of Poland from the- (of) The wind is coming from the west to the- (of) Oxford is to the north-toest of London towards the- Towards the north the woods turn into pine forests ... distributor for these Russian goods to the world market • PREP through althe - You can get the book through your local distributor I - for the exclusive distributor for these goods a distributor for the ... • PREP at the - There's someone at the door in the - He stood in the door for several minutes before deciding whether he'd stay through the - He looked through the door to make sure the children...

Ngày tải lên: 10/12/2013, 13:15

... Configure the hosts attached to the switches Configure the host to use the same subnet for the address, mask, and default gateway as on the switch Step Verify connectivity a To verify that the hosts ... is not the best choice It is necessary to force the “other” switch to become the root switch b In the example output given the root switch by default, is Switch_A Switch_B is preferred as the root ... Lab 7 .2. 4 Copyright  20 03, Cisco Systems, Inc a On the switch that was changed to be the root bridge, type show running-config at the privileged exec mode prompt b Is there an entry in the running...

Ngày tải lên: 11/12/2013, 14:15

... 99 .2 nh hư ng c a n ng ñ H2O2 ban ñ u ñ n hi u su t chuy n hoá 2, 4-dichlorophenol 120 100 [H2O2]/ [2, 4-DCP] = hi u su t (% ) 80 [H2O2]/ [2, 4-DCP] = [H2O2]/ [2, 4-DCP] = 60 [H2O2]/ [2, 4-DCP] = 40 20 ... 97 .2 97.7 98.0 98.8 90’ 97.7 98.0 98 .2 99.0 nh hư ng c a n ng ñ Fe2+ ñ n hi u su t chuy n hóa nitrobenzen Hch(%) 120 100 80 % [H2O2]/[Fe2+]=60 60 [H2O2]/[Fe2+] =20 [H2O2]/[Fe2+]= 12 40 [H2O2]/[Fe2+]=6 ... chuy n hoá 2, 4-DCP 120 hi u su t (%) 100 80 [H2O2]/[Fe2+]=60 [H2O2]/[Fe2+] =20 60 [H2O2]/[Fe2+]= 12 [H2O2]/[Fe2+]=6 40 20 0 10 th i gian (phút) 15 Hình 3.10 Đ th th hi n nh hư ng c a [Fe2+]o ñ n...

Ngày tải lên: 23/12/2013, 16:21

... 30 .2 22. 0 14.4 11 .2 0.3 86.8 74.1 56.0 35.7 22 .2 19.1 9 .2 6.0 0.4 90.1 70.4 48.5 30 .2 21.3 15.1 7.0 5.3 0.5 89.3 68.1 42. 9 25 .4 18.8 7.6 5.5 3.4 0.6 87.0 77 .2 51.1 39.1 35 .2 25.3 16 .2 15.1 TiO2(g/l) ... 2, 4–D thay ñ i theo th i gian hàm lư ng ph n ng TiO2 t (h) TiO2 0 .2 89.1 69 .2 58.4 46.0 39 .2 36.3 29 .2 18.0 0.3 95 .2 60.4 52. 7 46 .2 40.4 33.5 26 .1 16.6 0.4 92. 0 45.3 36.4 34.8 30.1 29 .6 25 .7 11.1 ... ñư c s c vào tham gia ph n ng ñ t o radical •OH e-CB + O2 → O2–(Ion superoxit) 2O2– + 2H2O → H2O2 + 2OH– + O2 H2O2 + e-CB → OH + OH- 22 Đ ng th i trình tái t h p c a electron vùng hóa tr v vùng...

Ngày tải lên: 23/12/2013, 16:45

... 16.04 16. 52 42. 3 17, 170 42. 5, 3.5 42. 5 18, 180 42. 5, 3.5 42. 2 19, 190 40.7 42. 0 20 , 20 0 13 43.3 42. 2 42. 2 42. 2 42. 0 a Referenced to external TMS; bfrom the experiment with [2, 20 -13C2]2C-methyl-D ... 100 11, 110 12, 120 13, 130 14, 140 15, 150 16, 160 17, 170 18, 180 19, 190 20 , 20 0 131 .23 123 .97 26 .77 39. 72 134.93 124 .22 26 .74 39. 72 135.33 124 .41 26 .68 40.49 139.51 120 .22 123 .35 25 .69 17.68 ... constants, the compound was identified as 2C-methyl-D -erythritol 2, 4-cyclodiphosphate (see [26 ] for NMR data of the authentic compound) The absence of singlet signals for the carbon atoms 1, 2, 2- Me,...

Ngày tải lên: 22/02/2014, 07:20

... .22 6 Summary 22 8 IChapter 8: Performance Tuning, Configuration, and Debugging 22 9 The CMS Definition of Performance 22 9 Latency .22 9 Throughput ... Executable 21 9 Building Scripting Capabilities into the CMS 22 0 Handling Script Files Between Tiers 22 3 Calling Scripts for a CMS Page 22 4 A Simple Scripting ... 23 1 Configurations 23 2 Scenarios 23 3 Running a WCAT Test Against the CMS .23 5 Interpreting Performance Results 23 6 Improving CMS Performance...

Ngày tải lên: 15/03/2014, 07:20

Ngày tải lên: 25/03/2014, 08:22

... at the compilation time CV_32FC1 == CV_32F, CV_32FC2 == CV_32FC (2) == CV_MAKETYPE(CV_32F, 2) , and CV_MAKETYPE(depth, n) == ((x&7)

Ngày tải lên: 25/03/2014, 12:21

... Around the Screen The Code Portion The Interface Builder Portion Recap 22 0 22 1 22 2 22 3 22 4 22 5 22 6 22 8 23 1 23 3 23 3 23 5 23 6 23 6 23 8 23 9 24 0 24 1 24 1 24 3 24 5 24 6 24 7 25 0 25 1 25 3 25 5 25 5 25 8 25 9 26 4 26 5 ... in the Future viii | Table of Contents 20 3 20 4 20 6 20 7 20 7 21 0 21 1 21 3 21 4 21 7 21 9 21 9 Days Between Dates Comparing Dates Downloading Remote Files Asynchronously Example Project Creating the ... Files What the runMyCode: Method Does 26 26 29 29 31 34 v Building the User Interface Adding a Button to the View Connecting the Button Going for a Test Ride Congratulations 35 38 42 46 49 Structural...

Ngày tải lên: 29/03/2014, 06:20